SERVICE MANUAL MULTIFUNCTIONAL DIGITAL SYSTEMS e-STUDIO350/450 e-STUDIO352/452 e-STUDIO353/453 Model: DP-3520/3540/4520/4540 Publish Date: November 2003 File No.
Trademarks • • • • • • • • • • • • • The official name of Windows 95 is Microsoft Windows 95 Operating System. The official name of Windows 98 is Microsoft Windows 98 Operating System. The official name of Windows Me is Microsoft Windows Millennium Edition Operating System. The official name of Windows 2000 is Microsoft Windows 2000 Operating System. The official name of Windows XP is Microsoft Windows XP Operating System.
GENERAL PRECAUTIONS REGARDING THE INSTALLATION AND SERVICE FOR e-STUDIO350/352/353/450/452/453 The installation and service should be done by a qualified service technician. 1. Transportation / Installation • When transporting/installing the equipment, employ two persons and be sure to use the positions as indicated below. The equipment is quite heavy and weighs approximately 83kg (182.98 lb.): e-STUDIO350/450 / 86kg (189.59 lb): e-STUDIO352/353/452/453 therefore pay full attention when handling it.
• Use suitable measuring instruments and tools. • Avoid exposure to laser radiation during servicing. - Avoid direct exposure to the beam. - Do not insert tools, parts, etc. that are reflective into the path of the laser beam. - Remove all watches, rings, bracelets, etc. that are reflective. • Unplug the power cable and clean the area around the prongs of the plug once a year or more. A fire may occur when dust lies on this area. 3.
CONTENTS 1. SPECIFICATIONS / ACCESSORIES / OPTIONS / SUPPLIES.....................................1-1 1.1 Specifications........................................................................................................................1-1 1.2 Accessories...........................................................................................................................1-5 1.3 Options...................................................................................................................
4.4 Flow Chart...........................................................................................................................4-12 4.4.1 Immediately after the power is turned ON...............................................................4-12 4.4.2 Automatic paper feed copying.................................................................................4-14 5. CONTROL PANEL.........................................................................................................5-1 5.
8. LASER OPTICAL UNIT..................................................................................................8-1 8.1 General Description..............................................................................................................8-1 8.2 Structure................................................................................................................................8-3 8.3 Laser Diode............................................................................................
12.4 Auto-Toner Circuit...............................................................................................................12-4 12.4.1 General description..................................................................................................12-4 12.4.2 Function of auto-toner sensor..................................................................................12-5 12.4.3 Adjustment using the temperature / humidity sensor...............................................12-7 12.4.
1. SPECIFICATIONS / ACCESSORIES / OPTIONS / SUPPLIES 1.1 Specifications Values in [ ] are for e-STUDIO450/452/453 in case that the specification is different between e-STUDIO350/352/353 and e-STUDIO450/452/453. • Copy process • Type Indirect electrophotographic process (dry) Desktop type (console type: when paper feed pedestal (PFP) and large capacity feeder (LCF) are installed) Fixed type (the left rear corner used as guide to place originals) Sheet, book and 3-dimensional object.
1 * System copy speed Sec. Copy mode e-STUDIO 350/352/353 e-STUDIO 450/452/453 Single-sided originals ↓ Single-sided copies 1 set 3 sets 5 sets 20.85 57.95 91.20 17.49 46.68 73.50 Single-sided originals ↓ Double-sided copies 1 set 3 sets 5 sets 27.42 62.18 97.55 25.71 57.41 89.03 Double-sided originals ↓ Double-sided copies 1 set 3 sets 5 sets 55.47 126.21 196.93 54.68 118.07 181.36 Double-sided originals ↓ Single-sided copies 1 set 3 sets 5 sets 48.22 117.44 184.96 48.20 102.18 155.
• Eliminated portion.............. Leading edges : 3.0±2.0 mm, Side/trailing edges : 2.0±2.0 mm (copy) Leading / trailing edges : 5.0±2.0 mm, Side edges : 5.0±2.0 mm (print) • Paper feeding..................... Automatic feeding : Standard drawers–2 drawers (stack height 60.5 mm, equivalent to 550 sheets; 64 to 80 g/m2 (17 to 22 lb.)) PFP–Option (One drawer or two : stack height 60.5 mm, equivalent to 550 sheets; 64 to 80 g/m2 (17 to 22 lb.) LCF–Option (Stack height 137.
1 • Dimensions of the equipment . ...... See the figure below W660 x D718 x H739 mm (e-STUDIO350/450) W660 x D758 x H739 mm (e-STUDIO352/353/452/453) * When the tilt angle of the control panel is 45 degrees. D 45˚ H W Fig.
1.2 Accessories 1 Unpacking/setup instruction 1 set Operator’s manual 4 pcs. (except for MJD) Operator's manual pocket 1 pc. Power cable 1 pc. Warranty sheet 1 pc. (for NAD) Setup report 1 set (for NAD and MJD) Customer satisfaction card 1 pc. (for MJD) PM sticker 1 pc. (for MJD) Drum (installed inside of the equipment) 1 pc. Toner bag 1 pc. Toner cartridge 1 pc. (except for NAD, MJD) Developer material 1 pc. (except for NAD,MJD) Operation panel stopper 1 pc. Blind seal 1 pc.
1 1.3 Options 1.3.
1.3.
1 Notes: 1. The bridge kit (KN-3520) is necessary for installation of the finisher (MJ-1022, MJ-1023/1024 or MJ-1101). 2. The finisher (MJ-1023/1024) is necessary for installation of the hole punch unit (MJ-6004N/ E/F/S). The finisher (MJ-1101) is necessary for installation of the hole punch unit (MJ-6101N/ E/F/S). 3. The PCI slot (GO-1060) is necessary for the installation of the scrambler board (GP-1040). 4.
1.
e-STUDIO350/352/353/450/452/453 SPECIFICATIONS 05/11 Staple Cartridge STAPLE-600 Finisher (Console saddle stitcher type) MJ-1024 Finisher (Console type) MJ-1023 Staple Cartridge STAPLE-2000 Staple Cartridge STAPLE-1600 Finisher (Hanging type) MJ-1022 2nd Line for FAX Board GD-1160 NA/EU/TW/C FAX Board GD-1150 NA/AU/EU/ TW/C/AS Drawer Module MY-1021 PCI Slot GO-1030 Offset Tray MJ-5005 Job Separator MJ-5004 Scrambler Board GP-1030 Hole Punch Unit MJ-6004 N/E/F/S Bridge Kit KN-3520 Paper Feed
© 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 1 - 11 08/04 Finisher (Console type) MJ-1101 Staple Cartridge STAPLE-2400 Staple Cartridge STAPLE-600 Finisher (Console saddle stitcher type) MJ-1024 Finisher (Console type) MJ-1023 Staple Cartridge STAPLE-2000 Staple Cartridge STAPLE-1600 Finisher (Hanging type) MJ-1022 Hole Punch Unit MJ-6101 N/E/F/S FAX Board GD-1200 NA/EU/AU/AS/ C/TW/KR Damp Heater MF-3520 U/E Hole Punch Unit MJ-6004 N/E/F/S Drawer Module MY-1021 2nd Line for FAX B
1 e-STUDIO350/352/353/450/452/453 SPECIFICATIONS 1 - 12 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved
2. OUTLINE OF THE MACHINE 2.1 Sectional View 2 4 5 2 3 70 7 3 7 5 ,5 3 4 2 27 57 45 5 5 2 52 4 3 7 40 2 42 55 23 23 32 24 30 25 37 4 47 0 43 4 44 0 54 2 72 5 53 22 20,2 3 3 4 5 34 33 7 20,2 3 4 5 2 35 3 50 4 Fig.
2 1 Original glass 37 Bypass paper sensor 2 ADF original glass 38 Bypass separation roller 3 Mirror-1 39 Temperature/humidity sensor 4 Mirror-2 40 Transfer charger 5 Mirror-3 41 Separation charger 6 Reflector 42 Drum 7 Lens 43 Developer unit 8 Exposure lamp 44 Cleaning blade 9 Automatic original detection sensor 45 Recovery blade 10 Toner cartridge switch 46 Main charger 11 Laser unit 47 Discharge LED 12 Laser unit cooling fan 48 Drum thermistor 13 Drawer pi
5 2 3 4 3 4 2 7 5 0 2 7 20 2 23 25 2 22 24 27 2 Fig.
2 1 Platen sensor 15 Fuser unit cooling fan 2 Scan motor 16 Registration clutch 3 Carriage home position sensor 17 ADU motor 4 Scanner damp heater (Left) 18 ADU clutch 5 Scanner damp heater (Right) 19 Bypass pickup solenoid 6 Scanner damp heater thermostat 20 Bypass feed clutch 7 IH board cooling fan 21 Side cover opening/closing switch 8 Developer unit cooling fan-1 22 Transport clutch (High speed) 9 Toner motor 23 Transport clutch (Low speed) 10 Developer drive clutch
2.2 Electric Parts Layout [A] Unit construction 2 Drive unit Scanner unit PC board unit Control panel unit Fuser unit Automatic duplexing unit Bypass unit Transport unit Process unit Laser unit Front side Paper feeder unit Fig.
[B] Scanner unit (B-1) Motor, sensor, lamp 2 A4 series S5 M1 S4 S7 S6 EXP S2 S3 S1 Front side Fig. 2-202-1 LT series S5 M1 S4 S7 S6 S2 EXP S3 Front side Fig.
(B-2) PC board, heater, thermostat, other part DH2* 2 CCD THMO2* SLG DH1* INV Front side Fig. 2-203 * ASD/AUD/CND/SAD/TWD models : Standard NAD/MJD models : Option [C] Control panel unit KEY LCD Front side DSP Fig.
[D] Process unit (D-1) Motor, sensor, switch, PC board 2 S9 S8 S10 M8 LRL S32 S12 M9 Front side S30 S31 Fig. 2-205 (D-2) Motor, sensor, lamp, heater, thermistor, thermostat ERS THMO3* THM3 S11 DH3* M16 PS Front side * ASD/AUD/CND/SAD/TWD models : Standard NAD/MJD models : Option Fig.
[E] Laser unit 2 SNS M2 LDR Front side Fig. 2-207 [F] Paper feeder unit CLT1 S20 CLT2 S22 S16 S21 S18 S23 S17 S19 Front side Fig.
[G] Transport unit M10 2 M11 S13 S14 S33 S15 Front side Fig. 2-209 [H] Bypass unit SFB CLT3 SOL1 S24 S25 Front side Fig.
[I] Automatic duplexing unit 2 S26 S27 ADU S28 M3 CLT4 Front side Fig. 2-211 [J] Fuser unit THMO1 S29 M12 IH-COIL THM1 THM2 Fig.
[K] Drive unit 2 M13 IH M7 M4 M15 M5 CLT5 CLT6 CLT7 M14 CLT8 M6 HVT Front side Fig.
[L] PC board unit 2 e-STUDIO350/450 SYS HDD NIC LGC NF FIL or FUS* BRK Front side * NAD/SAD/TWD models : FIL (Standard) ASD/AUD/CND models : FUS (Standard) MJD model : FUS (Option) Fig.
2 e-STUDIO352/353/452/453 HDD M17 SYS LGC NF BRK FUS Front side * NAD/SAD/TWD models : FIL (Standard) ASD/AUD/CND models : FUS (Standard) MJD model : FUS (Option) Fig.
2.3 Symbols and Functions of Various Components The column "P-I" shows the page and item number in the parts list.
(2) 2 Sensors and switches Symbol S1-5 Name APS1-3, APS-C, APS-R Function Original size detection Remarks P-I B-1 S1-4:P10 Automatic original detection sensor S6 HOME-SNR - I12 Carriage home position detection B-1 P10 - I17 PLTN-SNR Opening/closing detection of platen B-1 P13 - I10 Platen sensor cover or RADF TNR-SW Toner cartridge presence/absence D-1 P28 - I23 Toner cartridge switch detection USD-TNR-FLL-SNR1 Detecting if the used toner is full in the D-1 P12 - I28 Toner bag
Symbol S22 S23 S24 S25 S26 S27 Name Function CST-U-SW Detecting presence/absence of the Upper drawer detection switch upper drawer CST-L-SW Detecting presence/absence of the Lower drawer detection switch lower drawer SFB-SNR Detecting presence/absence of paper Bypass paper sensor on the bypass tray SFB-FED-SNR Detecting the transporting paper fed Bypass feed sensor from the bypass tray ADU-SET-SW Automatic duplexing unit opening/ ADU opening/closing switch closing detection ADU-TRU-SN
(3) 2 Electromagnetic clutches Symbol CLT1 Name Function Remarks P-I Driving the upper drawer pickup roller F P14 - I29 Driving the lower drawer pickup roller F P14 - I29 SFB-FEED-CLT Driving the bypass pickup roller and H P17 - I20 Bypass feed clutch bypass feed roller ADU-CLT Driving the automatic duplexing unit I P32 - I16 Driving the registration roller K P19 - I31 DEV-CLK Driving the magnetic roller of the K P12 - I36 Developer drive clutch developer unit CST-TR-L-CLT
(5) PC boards Symbol CCD SLG Name Function Remarks P-I B-2 P10 - I10 B-2 P10 - I38 C P3 - I26 C P3 - I25 D-1 P9 - I23 Driving the laser diode E P9 - I5 Detection of the laser beam position E P9 - I5 PWA-F-SFB Detection of the bypass tray slide H P16 - I13 Bypass tray slide guide width detection guide width I P32 - I30 K P7 - I2 L P7 - I34/ PWA-F-CCD Controlling CCD and outputting the CCD driving PC board (CCD board) analog signal PWA-F-SLG Controlling the original scan
(6) 2 Lamps and heaters Symbol EXP Name Remarks P-I Exposing the original to the light B-1 P21 - I6 LP-ERS Removing the residual charge from D-2 P25 - I33 Discharge LED the drum surface J P31 - I23 B-2 P10 - I22 B-2 P10 - I32 D-2 P27 - I7 Function Remarks P-I THMS-C-HTR Detecting the surface temperature at J P29 - I10 Main thermistor the center part of the fuser roller THMS-S-HTR Detecting the surface temperature at J P29 - I10 Edge thermistor the edge of the fuser roll
(8) Transformer Symbol HVT Name Function Remarks P-I K P4 - I29 Remarks P-I Controlling the exposure lamp B-2 P21 - I7 LCD Displaying and entering each C P3 - I19 LCD panel information PS-ACC Generating DC voltage and supplying D-2 P9 - I7 Switching power supply it to each section of the equipment HDD Storing the program data and image L P7 - I25/ Hard disk data NS-FIL Cutting noise of AC power L P6 - I13 BREAKER Preventing the inflow of overcurrent L P6 - I14 Breaker
e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE 05/11 HDD Modem NCU (LINE-2) PSTN FAX NCU (LINE-1) PSTN External TEL LAN connector (10BASE-T/100BASE-TX) FAX NIC Parallel port (IEEE-1284) USB connector (host-2) USB connector (host-1) USB connector (device) Printer kit, Printer/Scanner kit, Scanner upgrade kit Dongle Dongle Fig.
© 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 23 07/11 USB connector (device) Ether PHY North bridge (System controller) 32 64 64 LAN connector (10BASE-T/100BASE-TX) Modem Battery 8 32 SRAM 512KB 16 Main memory (DDR DIMM) 256MB System-CPU 400MHz RTC ASIC 32 32 PCI-bus 32 NCU (LINE-2) FAX ASIC 32 Motors ASIC PSTN 32 32 RADF Scanner-CPU 22MHz 16 8 ASIC SYS EEPROM 1KB Bluetooth module USB connector (host: internal) USB connector (host: external) 16 Fla
2.4.2 Construction of boards (a) 2 Construction diagram of boards This system consists of the following including the SYS board as a main board. Control panel Laser unit KEY DSP LDR LRL SNS NIC* SYS Scanner unit CCD ADU SLG LGC INV AC input FIL or FUS Main switch SFB PS-ACC IH HVT Cover opening/closing interlock switch : DC power supply line : AC power supply line * : e-STUDIO350/450 only : Signal line Fig.
KEY board: This is the board on which each button switch and each LED on the control panel are mounted. LDR board: This is the board on which the laser diode and the ASIC are mounted. The laser is emitted based on the output image data signal from the ASIC on the LGC board. SNS board: This is the board on which the light sensor for detecting the radiating position of the laser is mounted. It outputs the H-sync signal to ASIC on the LGC board.
2 NIC board (e-STUDIO350/450 only): This is the interface board to connect this equipment to the LAN environment (10BASE-T, 100BASE-TX) to communicate with PCs, etc. FIL board: This is the board to cut off the noise of AC power from outside, and supply the driving AC power to the damp heater for condensation prevention of each section (scanner and drum).
2.5 Installation and Replacement of Covers and PC boards 2.5.1 External covers 2 [A] Front cover (1) Open the front cover. Fig. 2-501 (2) Remove the toner bag. Fig. 2-502 (3) (4) Pull up the hinge pin and extract it. Take off the front cover. Fig. 2-503 [B] Front left cover (1) (2) Open the front cover. Remove 1 screw and front left cover. Guide Fig.
[C] Rear cover (C-1) e-STUDIO350/450 2 (1) Remove 7 screws and take off the rear cover. Fig. 2-505 (C-2) e-STUDIO352/353/452/453 (1) Remove 1 screw and take off the connector cover. Connector cover Fig. 2-506 (2) Remove 2 screws and take off the rear cover-1. Rear cover-1 Fig. 2-507 (3) Remove 3 screws and take off the rear cover-2. Rear cover-2 Note: If the RADF has been installed, disconnect the connector of the RADF before the above step. Fig.
[D] Left upper cover (1) Remove 2 screws and take off the left upper cover. 2 Fig. 2-509 [E] Front upper cover (1) (2) Take off the left upper cover ( Chapter 2.5.1 [D]). Remove 2 screws and take off the front upper cover. Fig. 2-510 [F] Right upper cover (1) Remove 3 screws and take off the right upper cover. Fig. 2-511 [G] Upper rear cover (1) (2) Take off the RADF or platen cover. Take off the left upper cover ( Chapter 2.5.1 [D]). Take off the right upper cover ( Chapter 2.5.1 [F]).
[H] Receiving tray (1) 2 Remove 2 screws and take off the receiving tray. Fig. 2-513 [I] Tray back cover (1) Take off the receiving tray ( Chapter 2.5.1 [H]). Take off the scan base cover. (2) 1 Scan base cover 2 Fig. 2-514 (3) Remove 1 screw and take off the receiving tray back cover. Fig. 2-515 [J] Left cover (1) Remove 3 screws and take off the left cover. Fig.
[K] Left rear cover (1) Take off the left upper cover ( Chapter 2.5.1 [D]). Remove 3 screws and take off the left rear cover. (2) 2 Fig. 2-517 [L] IH terminal cover (1) (2) Open the ADU, jam access cover and fuser unit cover. Remove 2 screws and take off the IH terminal cover. Fig. 2-518 [M] Right front hinge cover (1) (2) Pull out the upper and lower drawers. Remove 2 screws and take off the right front hinge cover. Fig.
[O] Right lower cover (1) 2 (2) Take off the right rear hinge cover ( Chapter 2.5.1 [N]). Remove 2 screws and take off the right lower cover. Fig. 2-521 [P] Right rear cover (1) (2) (3) (4) Take off the right upper cover ( 2.5.1 [F]). Take off the IH terminal cover ( 2.5.1 [L]). Take off the right rear hinge cover Chapter Chapter ( Chapter 2.5.1 [N]). Remove 2 screws and take off the right rear cover. Fig. 2-522 [Q] Front right cover (1) (2) (3) (4) (5) Take off the front cover ( Chapter 2.5.
2.5.2 PC boards Note: When the PC board/HDD is replaced, refer to each CAUTIONS of TROUBLESHOOTHING in the SERVICE HANDBOOK. 2 [A] Logic PC board (LGC board) (A-1) LGC board (1) (2) (3) (4) Take off the rear cover ( Chapter 2.5.1 [C]). Loosen 8 screws and take off the LGC board cover. Fig. 2-524 Disconnect 14 connectors and 1 connector with lock. Remove 4 screws and release 2 locking supports. Then take off the LGC board. Fig.
(4) Release all the harnesses from the harness clamps and holders on the case. 2 Fig. 2-528 (5) Remove 5 screws and take off the LGC board with the whole case. Fig. 2-529 [B] Hard disk / HDD cooling fan (B-1) e-STUDIO350/450 (1) (2) Take off the rear cover ( Chapter 2.5.1 [C]). Loosen 9 screws and take off the SYS board upper cover. Fig. 2-530 (3) (4) Disconnect 2 connectors. Loosen 5 screws and take off the hard disk with the whole SYS board lower cover. Fig.
(5) Remove 4 screws and take off the hard disk. 2 Fig. 2-532 (B-2) e-STUDIO352/353/452/453 (1) (2) Take off the rear cover-1. ( chapter 2.5.1[C]) Disconnect 1 connector. Release the harness from harness clamps. Fig. 2-533 (3) Loosen 10 screws and take off the SYS SYS board cover board cover. Fig. 2-534 (4) Disconnect 2 connectors. Fig.
(5) Remove 4 screws and take off the hard disk with the whole brackets. 2 Hard disk Fig. 2-536 (6) Remove 4 screws, disconnect 2 connectors and take off the hard disk. Remove 1 screw and take off the ground wire. Hard disk Ground wire Fig. 2-537 (7) Remove 2 screws and take off the HDD cooling fan from the SYS board cover. HDD cooling fan Fig. 2-538 [C] System control PC board case (SYS board case) (C-1) e-STUDIO350/450 (1) (2) (3) Take off the rear cover ( Chapter 2.5.1 [C]).
(4) Release all the harnesses from harness clamps and holders on the case. 2 Fig. 2-540 (5) Remove 5 screws and take off the SYS board case. Fig. 2-541 (C-2) e-STUDIO352/353/452/453 (1) (2) (3) Take off the connector cover and rear cover-1. ( chapter 2.5.1 [C]) Take off the hard disk with the whole brackets. ( chapter 2.5.2 [B]) Disconnect 4 connectors. Fig. 2-542 (4) Release the harnesses from 2 harness clamps. Fig.
(5) Remove 5 screws and take off the SYS board case. 2 SYS board case Fig. 2-544 [D] NIC board / System control PC board (SYS board) (D-1) e-STUDIO350/450 (1) (2) (3) Take off the rear cover ( Chapter 2.5.1 [C]). Take off the hard disk with the whole SYS board lower cover ( Chapter 2.5.2 [B]). Disconnect 5 connectors. Fig. 2-545 (4) Remove 2 screws, release 1 lock support. Then take off the NIC board. NIC board Fig. 2-546 (5) Remove 10 screws, take off the SYS board. SYS board Fig.
(D-2) e-STUDIO352/353/452/453 (1) (2) Take off the hard disk with the whole brackets. ( chapter 2.5.1 [B]) Disconnect 4 connectors. 2 Fig. 2-548 Note: Alternatively, you can take off the SYS board without removing the hard disk by removing 2 upper and 1 lower fixing screws for the hard disk bracket and 1 fixing screw for the ground wire to tilt down the hard disk toward you. Fig. 2-549 (3) Remove 8 screws and take off the SYS board. SYS board Fig.
(3) 2 Disconnect 3 connectors while the switching power supply is pulled out to the front and take off the switching power supply. Fig. 2-552 [F] Power supply cooling fan (1) (2) Take off the left cover ( Chapter 2.5.1 [J]). Remove 2 screws and take off the power supply cooling fan on the switching power supply. Note: When installing, pay attention to the direction of the wind from the fan. Fig. 2-553 [G] High-voltage transformer (1) (2) (3) Take off the rear cover ( Chapter 2.5.1 [C]).
2.6 Options [A] MR-3015 (Reversing Automatic Document Feeder (RADF)) (1) (2) 2 Turn OFF the power and unplug the power cable. Take off the connector cover. Fig. 2-601 (3) Disconnect the connector. Fig. 2-602 (4) Remove 2 screws on the rear side. Fig. 2-603 (5) Open the RADF. Fig.
(6) Remove 2 screws on the front side. 2 Fig. 2-605 (7) Slide the RADF backward and take off by lifting it up. Fig. 2-606 [B] KD-1011 (Paper Feed Pedestal (PFP)) (1) Turn OFF the power and unplug the power cable. (2) Take off the rear cover of the equipment. ( Chapter 2.5.1 [C]) Note: Disconnect the connector of the RADF first when the RADF is installed. (3) Remove 1 screw and the ground wire, and then disconnect 2 connectors (3 if the optional damp heater is installed).
(5) Take off the lower drawer of the equipment and PFP upper drawer. 2 Fig. 2-609 (6) Remove 4 screws and take off 2 fixing brackets on the front side. Fig. 2-610 (7) Lift up the equipment and take off the PFP. Fig. 2-611 [C] KD-1012 (Large Capacity Feeder (LCF)) (1) Turn OFF the power and unplug the power cable. (2) Take off the rear cover of the equipment. ( Chapter 2.5.1 [C]) Note: Disconnect the connectors of the RADF first when the RADF is installed.
(4) Remove 2 screws and take off 2 fixing brackets on the rear side. 2 Fig. 2-613 (5) Take off the lower drawer of the equipment. Fig. 2-614 (6) Pull out the LCF drawer. Fig. 2-615 (7) Remove 4 screws and take off 2 fixing brackets on the front side. Fig.
(8) Lift up the equipment and take off the LCF. 2 Fig. 2-617 [D] MJ-1022 (Hanging finisher) (D-1) When PFP/LCF is not installed (1) (2) Turn OFF the power and unplug the power cable. Take off the connector cover and disconnect the connector. Fig. 2-618 (3) Remove 2 screws and take off the safety bracket on the rear side and the cover. Fig. 2-619 (4) Remove 2 screws and take off the safety bracket on the front side and the cover. Fig.
(5) Remove 2 screws. 2 Fig. 2-621 (6) Lift up the finisher and take it off. Fig. 2-622 (D-2) When PFP/LCF is installed (1) (2) Turn OFF the power and unplug the power cable. Take off the connector cover and disconnect the connector. Fig. 2-623 (3) Remove 2 screws and take off the cover on the rear side. Fig.
(4) Remove 2 screws and take off the cover on the front side. 2 Fig. 2-625 (5) Remove 2 screws. Fig. 2-626 (6) Lift up the finisher and take it off. Fig. 2-627 [E] MJ-1023 (Console finisher) (1) (2) Turn OFF the power and unplug the power cable. Take off the connector cover and disconnect the connector. Fig.
(3) Remove 1 screw and take off the finisher lower cover. 2 Fig. 2-629 (4) Remove 3 screws and take off the finisher front cover. Fig. 2-630 (5) Remove 1 screw. Fig. 2-631 (6) Remove 1 screw and take off the cover of the finisher rear side. Fig.
(7) Remove 1 screw. 2 Fig. 2-633 (8) Take off the finisher. Note: Be careful not to fell the finisher when moving the finisher unit only. Fig. 2-634 [F] MJ-1024 (Console finisher) (1) (2) Turn OFF the power and unplug the power cable. Take off the connector cover and disconnect the connector. Fig. 2-635 (3) Open the finisher front cover and remove 1 screw. Fig.
(4) Remove 1 screw and take off the cover of the finisher rear side. 2 Fig. 2-637 (5) Remove 1 screw. Fig. 2-638 (6) Take off the finisher. Note: Be careful not to fell the finisher when moving the finisher unit only. Fig. 2-639 [G] MJ-6004 (Hole punch unit) (1) (2) Turn OFF the power and unplug the power cable. Take off the connector cover and disconnect connector. Fig.
(3) Open the front cover of the hole punch unit and remove 1 screw. 2 Fig. 2-641 (4) Take off the cover of the punch unit lower side. Fig. 2-642 (5) Remove 1 screw. Fig. 2-643 (6) Remove 3 screws and take off the punch unit rear cover. Fig.
(7) Remove 1 screw. 2 Fig. 2-645 (8) Take off the finisher with the hole punch unit. Note: Be careful not to fell the finisher when moving the finisher unit only. Fig. 2-646 (9) Disconnect 2 connectors. Fig. 2-647 (10) Remove 2 screws. Fig.
(11) Lift up the punch unit and take it off. 2 Fig. 2-649 [H] KN-3520 (Bridge unit) (1) (2) Turn OFF the power and unplug the power cable. Remove 2 screws and take off the cover. Fig. 2-650 (3) Disconnect 1 connector. Fig. 2-651 (4) Open the bridge unit. Remove 1 screw and take off the cover. Fig.
(5) Close the bridge unit and remove 1 screw. 2 Fig. 2-653 (6) Remove 4 screws and take off the bracket. Fig. 2-654 (7) Lift up the bridge unit and release the hook. Take off the bridge unit toward the front. Fig. 2-655 [I] MJ-5004 (Job separator) (1) Turn OFF the power and unplug the power cable. Take off the tray. (2) Fig.
(3) Remove 2 screws and take off the cover. 2 Fig. 2-657 (4) Disconnect 2 connectors. Fig. 2-658 (5) Loosen 2 screws and take off the cover. Fig. 2-659 (6) (7) Remove 1 screw. Lift up the job separator and release the hook. Take off the job separator toward the front. Fig.
2 [J] MJ-5005 (Offset tray) (1) Turn OFF the power and unplug the power cable. Take off the tray. (2) Fig. 2-661 (3) Remove 2 screws and take off the cover. Fig. 2-662 (4) Disconnect 2 connectors. Fig. 2-663 (5) Remove 1 screw and take off the cover. Fig.
(6) (7) Remove 1 screw. Lift up the offset tray and release the hook. Take off the offset tray toward the front. 2 Fig. 2-665 [K] MR-3018 (Reversing Automatic Document Feeder (RADF)) (1) (2) Turn the power OFF and unplug the power cable. Take off the connector cover. Fig. 2-666 (3) Disconnect the connector. Fig. 2-667 (4) Remove 1 screw and 1 washer on the rear side. Fig.
(5) Remove 1 screw on the rear side. 2 Fig. 2-669 (6) Open the RADF. Fig. 2-670 (7) Remove 2 screws on the front side. Fig. 2-671 (8) Slide the RADF backward and take it off by lifting it up. Fig.
[L] MJ-1101 (Console finisher) (1) (2) Turn the power OFF and unplug the power cable. Take off the connector cover and disconnect 1 connector. 2 Fig. 2-673 (3) Open the front cover of the finisher. Remove 1 screw and slide the lever to the front side. Fig. 2-674 (4) Take off the finisher. Note: When moving the finisher unit by itself, be careful that it does not topple over. Fig. 2-675 [M] MJ-6101(Hole punch unit) (1) (2) Turn the power off and unplug the power cable.
(3) Release the Latches and take off the front lower cover of the hole punch unit. 2 Fig. 2-677 (4) Remove 1 screw and slide the lever to the front side. (5) Take off the finisher. Note: When moving the finisher unit by itself, be careful that it does not topple over. Fig. 2-678 (6) Remove 1 screw and take off the maintenance cover. Fig. 2-679 (7) Disconnect 1 connector. Fig.
(8) (9) Remove 2 screws. Take off the hole punch unit. 2 Fig.
2 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE 2 - 62 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved
3. COPY PROCESS 3.1 General Description of Copying Process Paper exit (2) Original exposure Xenon lamp 16W (9) (3) Data reading (scanning) CCD 600 dpi, 7400 pixel Discharge LED (red) Wavelength 660nm x14pcs (1) Image processing 700~1240W (10) Discharging (11) (4) Fusing Inductionheating (IH) method Cleaning Blade method (8) Charging –790V (grid voltage) Separation ACH 5.5kV C 4.0kV L 2.5kV DC -100V 1kHz Data writing Semiconductive laser Pw=4.
3.2 Details of Copying Process 3 Photoconductive drum The photoconductive drum consists of two layers. The outer layer is a photoconductive layer made of an organic photoconductive carrier (OPC), and the inner layer is an aluminum conductive base in a cylindrical form. The photoconductor has the following property: when it is exposed to light, the electrical resistance it possesses increases or decreases according to the strength of the light.
(3) Data reading (scanning) Data reading is the process of illuminating the original with light and converting the reflected light into electrical signals. The light reflected from the original is directed to the charge coupled device (CCD) and this optical image information is converted into electrical signals (image signals), which are then transmitted to the image processing section. CCD 3 Image processing section Fig.
(5) 3 Development Development is the process of making the electrostatic latent images visible to the eye (visible images). Drum Developer material is supplied to the photoconductive drum surface by the magnetic roller. The toner in the developer material adheres to the areas on the drum surface where the potential is lower than the developer bias which is applied to the magnetic roller (reverse development method). Magnetic roller Fig.
• Switching of developer bias polarity With the area which has no negative charge, background fogging is decreased by switching the bias to the positive polarity (approx. +150 V). Carbon (5-10%) 3 • Developer material The developer material consists of a mixture of 5-20 µm the toner and carrier. The toner is charged to Ferrite Resin (90-95%) the negative polarity and the carrier to positive [Toner] polarity due to the friction with each other caused by mixing.
Additional Explanation The life of the toner cartridge (number of output pages) varies depending on the following conditions. 3 1. 2. 3. 4. 5. 6. Coverage of originals (printing image ratio of the original size) and density of original background Size and density of originals The existence of solid black when making prints (when a book is copied and the original cover is partially opened) Temperature and humidity in the room when making prints.
(6) Transfer Transfer is the process of transferring the toner image (visible image) formed on the drum surface onto paper. Method : A paper passing the side of the drum is charged to the opposite polarity to the Paper Drum that of toner by the corona discharge of the transfer charger. Transfer charger The toner moves from the drum surface Fig. 3-214 onto the paper.
* Output is controlled as follows to realizes the desirable separability and transferability. Paper position against transfer point 3 Separation output From leading edge to 10 mm from leading edge (H) 5.5kV AC/–100 V DC From 10 mm from leading edge to 17 mm from trailing edge (C) 4.0kV AC/–100 V DC From 17 mm from trailing edge to trailing edge (L) 2.
(9) Cleaning Cleaning is the process of removing the residual toner from the photoconductive drum. Recovery blade Cleaning blade The edge of the urethane rubber cleaning blade is pressed against the photoconductive drum surface to scrape off the residual toner on it. The toner is then caught by the recovery blade. (10) Discharging Discharging is the process of eliminating the negative charge remaining on the photoconductive drum before the next charging process.
3.3 Comparison with DP4500/3500 Process 3 DP4500/3500 e-STUDIO350/352/353/450/452/453 1. Photoconductive drum OD-3500 (OPCø60) ← (1) Sensitivity Highly sensitized/durable drum ← (2) Surface potential -750 V ← 2. Charging Scorotron method ← (1) Grid voltage -790 V ← 3. Data writing (1) Light source Semiconductor laser (Adjustment not ← (2) Light amount 4.0 nJ/mm2 4.3 nJ/mm2 (1) Magnetic roller One magnetic roller ← (2) Auto-toner Magnetic bridge-circuit method ← required) 4.
4. GENERAL OPERATION 4.1 Overview of Operation Operation of equipment Operation during initializing, pre-running and ready Drawer feed copying by [START] button Copying operation Bypass feed copying Interrupt copying 4.2 Description of Operation 4.2.1 Warming-up (1) Initialization • Power ON • IH coil ON • Set number “1” reproduction ratio “100%” and “WAIT WARMING UP” are displayed • Fan motors ON • Initialization of scanning system – The carriage moves to the home position.
4.2.2 Ready state (ready for copying) • • 4 Buttons on the control panel enabled When no button is pressed for a certain period of time, – Set number “1” and reproduction ratio “100%” are displayed. Equipment returns to the normal ready state. 4.2.
(6) Paper exit • Exit sensor detects the trailing edge of the paper • Main charger, developer bias and discharge LED OFF • Polygonal motor, main motor and exit motor OFF • Drum, fuser unit and developer unit stop • Fans return to the ready rotation • “READY” is displayed and the equipment enters the ready mode © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - 4 e-STUDIO350/352/353/450/452/453 GENERAL OPERATION
e-STUDIO350/352/353/450/452/453 GENERAL OPERATION 04/01 4 - Exit sensor Discharge LED Developer bias Main charger MVDEN signal Registration clutch + – rev. Registration sensor Upper drawer feed sensor Upper drawer feed clutch Main motor Exposure lamp Scan motor fwd.
4.2.4 Bypass feed copying (1) Insert a sheet of paper into the bypass tray. • Bypass paper sensor ON – “Ready for bypass feeding” is displayed. • Carriages move to the home position (2) Press the [START] button • “Ready for bypass feeding” changes to “COPYING” • Exposure lamp ON • Scan motor ON → Carriages -1 and -2 move forward • • (3) Polygonal motor rotates in high speed Main motor and exit motor ON – The drum, fuser unit, developer unit and exit roller are driven.
(3) After the interruption copying is finished: • LED “INTERRUPT” OFF by pressing the [INTERRUPT] button • Equipment returns to the status before the interruption • (4) 4 “Ready to resume job 1” is displayed Press the [START] button The copying operation before the interruption is resumed. 4.3 Detection of Abnormality When something abnormal has occurred in the equipment, the symbols corresponding to the type of abnormality are displayed. 4.3.
4.3.2 Description of abnormality A-1) Add paper Drawer empty sensor detects the presence or absence of paper.
• When the power is turned ON or the LCF drawer is inserted (when the power is turned ON or equipment drawer / PFP drawers are inserted), LCF performs initialization. ↓ 4 Detects the presence of paper Tray-up motor ON – The tray goes up At this time, the tray-up sensor and LCF empty sensor are OFF. → When the tray-up sensor is not turned ON in a fixed period of time, it means that the tray is in abnormal condition. → “Add paper” is displayed regardless of presence/absence of paper.
A-2) • Bypass misfeeding ( During bypass feeding Bypass feed clutch ON ) ↓ Registration sensor ON * Registration sensor is not turned ON in a fixed period of time (E120) 4 ↓ Bypass misfeeding (E120) ↓ Bypass misfeeding symbol is displayed ( ) ↓ Copying operation is disabled ↓ Solution: The bypass paper sensor is turned OFF by removing the paper from the bypass tray.
• Exit sensor detects jamming of the trailing edge of paper. ↓ Registration clutch OFF ↓ Less than 1.116 sec. Exit sensor OFF If the exit sensor is not turned OFF after 1.116 seconds, 4 Registration clutch Exit sensor ↓ Timer Paper jam (E020) → The copying operation is stopped. • OFF ON 0 . sec. Paper jam (E020) Immediately after the power ON Fig.
• During paper feeding from the equipment or PFP: Registration sensor is not turned ON in a fixed period of time after the feed clutch is turned ON ↓ Paper jam (E220, E310, E320, E340–E360, E3D0 and E3E0: Error code differs depending on the paper source.
4.4 Flow Chart 4.4.1 Immediately after the power is turned ON Ma n sw tch ON DC power ON 4 Restart YES Cover s open? NO IH co l ON YES Reg strat on sensor ON? Scan motor ON NO YES Ex t sensor ON? Home pos t on detected? YES NO YES ADU entrance/ex t sensors ON? NO YES Upper drawer feed sensor ON? NO Peak detected? YES Call for serv ce NO 2.
A Temperature of the fuser roller ready for pre-runn ng? NO YES Ma n motor ON Tray-up motor ON Therm stor broken? YES NO Fuser roller reached ready temp.
4.4.
C Paper jam NG “E020” Ex t sensor detected tra l ng edge of paper? OK 4 Polygonal motor OFF Ma n charger OFF D scharge LED OFF Developer b as OFF Ex t motor OFF Drum rotat on reversed Ma n motor OFF READY © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - 15 e-STUDIO350/352/353/450/452/453 GENERAL OPERATION
4 e-STUDIO350/352/353/450/452/453 GENERAL OPERATION 4 - 16 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved
5. CONTROL PANEL 5.1 Control Panel and Display Panel The control panel consists of button switches and touch-panel switches to operate equipment and select various modes, and LEDs and an LCD to display the state of the equipment or the messages. When the operator’s attention is required, graphic symbols appear with messages explaining the condition of the equipment in the LCD panel. This equipment has a movable control panel which enables to adjust its angle to the operator.
5.2 Items Shown on the Display Panel 5 Fig. 5-201 Fig.
5.2.1 Display No.
5 No. Message 20 READY (SADDLE STITCH TRAY FULL) 21 READY (CHANGE DRAWER TO CORRECT PAPER SIZE) 22 Ready for bypass feeding 23 COPYING 24 Auto Start 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 Close Large Capacity Feeder Close Large Capacity Feeder Door Place Doc. Feeder in the down position Insert key copy counter Place originals in the document feeder Change direction of original Place last %d originals in doc.
No.
5 No.
No. Message 74 Misfeed in copier 75 76 77 State of equipment Paper jam in the equipment - Displayed when paper jam occurred in the equipment Call for service Displayed when motor, sensor, switch, etc. do not work properly Please try again after Displayed when the Department Code can a while no be keyed in immediately after power-ON.
e-STUDIO350/352/353/450/452/453 CONTROL PANEL 5 - Press [START] button with the original set on RADF Press [EXTENSION] button Press [TEMPLATE] button Press [USER FUNCTIONS] button Press [HELP] button Displays “COPYING” “Wait Warming Up Auto Start” is displayed Display not changed Display not changed Display not changed Display not changed Display not changed Displays TEMPLATE Display not changed Display not changed screen Displays USER Display not changed Display not changed FUNCTIONS screen Di
5.4 Description of Operation 5.4.1 Dot matrix LCD circuit (1) Structure 5 ( 40 x 240) Fig. 5-401 The LCD panel is an STN blue mode transmissive type LCD with 640x240-dot display capacity. It consists of a driver LSI, frame, printed circuit board, and lateral type CCFL backlight.
(3) System diagram Signals flowing between the control panel and the system board are indicated in the chart below. When the panel processing CPU detects that the control panel is operated, the operational contents are transmitted to the System board through the serial data. The state of the equipment and the messages from the System board are received by the LCD controller and then displayed on the LCD. The LED and buzzers are switched to ON/OFF with the signals from the System control PC board.
(4) Data Transmission /tF /tF FRAME 240 2 240 2 240 2 LOAD 5 FRAME LOAD CP CP x( 40/4) pulses D0-D3 Fig. 5-404 5.4.2 LED display circuit (1) Method of LED display ex) Displaying “COPY” . 5VL LDON0 Current "L" "L" 17 G Q3 (COPY) LED D7 R3 IC Fig. 5-405 Transistor is turned ON when the LDON 0 signal becomes “L” level. Also, when IC pin changes to “L”, the current flows from 5VL via the transistor to the LED (“COPY”) to turn ON the LED (“COPY”).
5.5 Disassembly and Replacement Note: When taking off the control panel, check a the position of the stopper; if the stopper b is at the position “b”, remove the stopper or move it to the position “a”. 5 Fig. 5-501 [A] Stopper (1) Slide the stopper and pull it out. Stopper Fig. 5-502 [B] Control panel unit (1) Take off the right upper cover and the front upper cover. ( Chapter 2.5.1 [I] [J]) (2) Disconnect 1 connector. (3) Release the harness from 3 harness clamps. Fig.
(6) Remove 3 screws and take off the cover. Cover 5 Fig. 5-505 (7) Remove 5 screws and take off the hinge Hinge bracket bracket. Fig. 5-506 (8) Disconnect 5 connectors. (9) Release the harness from 2 harness clamps. (10) Remove 1 screw and take off the DSP DSP board board. Fig. 5-507 (11) Remove 4 screws and take off the LCD. LCD Fig.
(12) Remove 16 screws and take off the KEY KEY board board. 5 Fig.
6. SCANNER 6.1 Function In the scanning section of this equipment, the surface of an original is irradiated with a direct light and the reflected light is led through mirrors, a lens and a slit to CCD where optical-to-electrical conversion is performed, converting the optical image data into an electrical (analog) signal. This analog signal is changed to a digital signal, which then undertakes various corrective processes necessary for image formation.
6.2 Construction The following shows the construction and purpose of the scanning system: (1) Original glass This is a glass on which original is placed. The light from the exposure lamp is irradiated to the original through this glass. (2) Carriage-1 Carriage-1 consists of the exposure lamp, lamp inverters, reflector, mirror-1, etc. It is driven by the scan motor and scans an original on the glass. 6 Reflector Lamp inverter Exposure lamp Mirror-1 Fig. 6-201 a.
(3) Carriage-2 Carriage-2 mainly consists of the mirror-2, mirror-3, etc. and directs the reflected light from the mirror-1 through the mirrors-2 and -3 to the lens. This carriage is driven by the same scan motor as that for the carriage-1 at half the scanning speed of the carriage-1 (The scanning distance is also half that of the carriage-1). Mirror-2 6 Mirror-3 Fig.
6.3 Description of Operation 6.3.1 Scan motor Carriage-1 Scan motor Wire pulley 6 Carriage-2 Motor speed-reduction pulley Motor pulley Idler pulley Fig. 6-301 (a) Scanning of an original placed on the original glass This motor drives the carriages-1 and -2 through the timing belt and carriage wire. First, the scan motor drives the carriages-1 and -2 to their respective home position. The home position is detected when the carriage-1 passes the home position sensor.
6.3.2 Scanning drive circuit The scan motor is a 2-phase stepping motor and driven by the driver IC (IC16). +24V +24V DG GND MOTREF Voltage to set value for motor current B +24V B VREF A M Scan motor +24V Scanner CPU A MOTCLK Clock nput MOTMD3 Exc tat on mode sett ng (3) MOTMD2 Exc tat on mode sett ng (2) MOTMD Exc tat on mode sett ng ( ) MOTDIR Rotat on d rect on sett ng MOTEN Cut off output MOTRST Reset CLK M3 M2 M CWB EN RESET +5V +5V RESET IC GND GND SLG board Fig.
Input/output signals Motor is rotated by setting number of pulse. Clock input MOTCLK Input * Internal circuit of the motor driver works when the first pulse be-comes ON and the last pulse becomes OFF. The direction of the motor rotation is determined by setting level of signal. “L”….
6.3.3 Initialization at power-ON The carriage moves to its home position and performs the peak detection. Then it moves to the carriage waiting position and waits.
6.4 Control of Exposure Lamp 6.4.1 General description Control circuit for the exposure lamp consists of the following three blocks: (1) Lighting device for the xenon lamp (Inverter) Turns ON/OFF the exposure lamp. (2) CCD circuit This circuit converts the reflected light amount from the original surface and the shading correction plate to electrical signals.
6.4.2 Exposure lamp External electrode type xenon fluorescent lamp is used as an exposure lamp in this equipment. (1) Structure Fluorescer is applied on the inside surface of the lamp pipe (except a part to be an opening) which is filled with the xenon gas. A pair of the external electrodes covered by the film with the adhesive agent is attached over the pipe. PET film 6 Aluminum tape electrode Glass valve Fluorescer Adhesive agent, PET, film Xenon gas Fig.
6.4.3 Control circuit for the exposure lamp SLG board +5VSW +24V +5V HIGH LMPON IC4 +5V IC9 6 LOW D3 Xenon lamp Q4 WDTOUT Q6 IC6 IC21 5VSWON LAMP-EXPO INV-EXPO-360 IC34 Scanner CPU Fig. 6-404 Working conditions LMPON L - - - Exposure lamp ON signal Lamp turns ON at “L” 5VSW ON L H - - 5V SW ON signal Controls 5VSW by CPU.
6.5 General Description of CCD Control 6.5.1 Opto-electronic conversion A CCD (charge-coupled device) is used to produce electrical signal corresponding to the reflected light amount from the original. CCD is a one-chip opto-electronic conversion device, comprised of several thousand light-receiving elements arranged in a line, each one of them is a few micron square. This equipment is equipped with a CCD which has 7,400 light-receiving elements.
6.6 Automatic Original Size Detection Circuit This circuit detects the size of original (standard sizes only) using the reflection type photosensors arranged on the base frame of the scanner unit. 6.6.1 Principle of original size detection Reflection type photosensors are placed on the base frame of the scanner unit as shown in the Fig. 6-601. Each sensor consists of an infrared light emitting diode (LED) on the light emitting side, and a phototransistor on the light receiving side.
[A4 Series] A5 B5 A4 APS-R APS-C 6 A5–R B5–R A4–R APS-3 B4 APS- APS-2 A3 [LT Series] ST LT APS-R APS-C ST–R APS-3 LT–R LG APS-2 LD Fig.
(4) Original size is determined by the combination of the signals output from each detection point. Combination charts for size determination of A4 series and LT series are as follows.
About reflection type photosensor The reflection type photosensor is comprised of an infrared light emitting diode and a phototransistor. It uses pulse modulation to detect an original. Original 8µsec 130µsec Phototransistor LED Fig. 6-604 The light emitting diode is driven by a pulse having a 130 µsec cycle and an 8 µsec ON time. When the phototransistor receives the same signal as this pulse, it is determined that there is an original.
6.7 Disassembly and Replacement [A] Original glass (1) Take off the right upper cover ( Chapter 2.5.1 [F]). (2) Remove 2 screws and take off the fixing bracket. 6 Fig. 6-701 (3) Take off the original glass. Protrusion Note: When installing, fit 2 small protrusions of the original glass in the groove of the equipment and fix the original glass with the fixing bracket by pushing it to the left rear direction. Original glass Fig.
(C-2) LT series (1) Take off the lens cover ( Chapter 6.7 [B]). (2) Disconnect 1 connector from the SLG board. (3) Release the harnesses from 6 harness clamps. (4) Remove 1 screw each and take off the APS sensors (4 pcs.). Fig. 6-704L [D] Exposure lamp (1) Take off the original glass ( Chapter 6.7 [A]). (2) Take off the front upper cover ( Chapter 2.5.1 [E]). (3) Move the carriage-1 to the center position where the side of the frame is cut out. Fig.
(7) Remove 1 screw. Lift up the exposure lamp and take it off by pulling out toward you. Note: Make sure to hold only the black molded part of the exposure lamp. Do not touch any other part than this black molded part. 6 Fig. 6-708 [E] Lens unit (1) Take off the lens cover ( Chapter 6.7 [B]). (2) Disconnect 1 connector from the SLG board. (3) Remove 2 screws and take off the lens unit. Fig. 6-709 Notes: 1.
[F] Scan motor (1) Take off the rear cover and upper rear cover ( (2) Chapter 2.5.1 [C][G]). Disconnect the connector of the scan motor and remove 1 spring. Rear side Fig. 6-712 (3) Remove 3 screws and take off the scan motor. Note: When installing, use a stepped screw to fix the left rear point. Stepped screw Fig. 6-713 [G] Carriage-1 (1) Take off the original glass ( (2) Take off the upper rear cover and front upper cover ( (3) Chapter 6.7 [A]). Chapter 2.5.1 [G][E]).
Note: Lamp harness Make sure to hold only the black molded part of the exposure lamp. Do not touch any Lamp harness Black line other part than this black molded part. 1. Using alcohol, clean the area where Hole Punched mark the seal is to be attached.. Seal 2. Align the black line on the lamp harness with the position as shown in the figure, and fix it with a seal. 6 Fig. 6-716 3.
[H] Mirror-1 (1) Take off the carriage-1 ( Chapter 6.7 [G]). Note: When replacing the mirror-1, replace the carriage-1 together with mirror-1. Mirror-1 should not be removed. 6 [I] INV board (1) Take off the carriage-1 ( (2) Disconnect 2 connectors. (3) Remove 2 screws and take off the INV Chapter 6.7 [G]). board. Fig. 6-720 [J] Carriage wire / Carriage-2 (1) Take off the carriage-1 ( (2) Install the wire holder jig to each pulley on Chapter 6.7 [G]).
(5) Rotate the carriage-2 in the direction where the inside of the frame is dented shown in the figure at right, not to touch the mirror. Then take off the carriage-2. 6 Fig. 6-723 [K] Mirrors-2 and -3 (1) Take off the carriage-2 ( Chapter 6.7 [J]). Note: When replacing the mirrors-2 and -3, replace the carriage-2 together with mirrors-2 and -3. Mirrors-2 and -3 should not be removed.
[M] SLG board (1) Take off the lens cover ( Chapter 6.7 [B]). (2) Disconnect 8 connectors from the SLG board. (3) Remove 6 screws and take off the SLG board. Note: The SLG board for e-STUDIO350/450 and the one for e-STUDIO352/353/452/453 are Fig. 6-725 different. To avoid confusion, the color of the connector CN19 on the SLG board for e-STUDIO352/353/452/453 is yellow.
6 e-STUDIO350/352/353/450/452/453 SCANNER 6 - 24 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved
7. IMAGE PROCESSING 7.1 General Description The following diagram shows the process of the equipment from scanning of original to writing data on the photoconductive drum surface. Scann ng sect on Image process ng sect on Wr t ng sect on Or g nal 7 Or g nal glass Lens Scann ng sect on [CCD] Image process ng/ scann ng control sect on [SLG] Image process ng/ wr t ng control sect on [LGC] Laser dr ve sect on [LDR] System sect on [SYS] Sem conduct ve laser element Photoconduct ve drum Fig.
Image of an original placed on the original table is scanned by the optical system. The CCD (Charge Coupled Device) reads the optical image signals and converts them into the electrical signals. The electrical signals are amplified and undergo analog-to-digital conversion, then are changed into digital signals. Shading correction (correction of variance in CCD elements and the light source) is performed and the digital signal is output as an image signal from the scanning section.
7.2 Configuration The following diagram shows the image processing section of this equipment.
7.3 SLG Board 7.3.1 Features (1) The image processing section on the SLG board is controlled by the CPU on the SLG board.
7.3.2 Functions of image processing circuit The image processing section mounted on the SYS board realizes the followings: (1) High quality image processing (a) Background processing function (Rauge correction) This function removes undesirable background so that the original can be reproduced appropriately.
(b) Filtering This function is enabled by low-pass filter processing and high-pass filter processing. • Low-pass filter processing This processing removes image/electrical noise and decreases moire by performing averaging operation between the image signals of the targeted pixel and those of the neighboring pixels to enhance the reproducibility of original. Density of the targeted pixel position is X.
(2) Image memory editing This function performs editing such as enlargement/reduction, mirror imaging, etc., by using a line memory. Pixel data for one line in the primary scanning direction is stored in the line memory and the memory is renewed at each line. (a) Enlargement/Reduction Enlargement/Reduction is accomplished by using the line memory control function in the process of the image processing operation.
(4) Gamma correction This function corrects the input/output characteristics of the scanner/printer and adjusts the image signals so that the input/output characteristics would match with the copy mode.
7.4 LGC Board 7.4.1 Features (1) The image processing section on the LGC board is controlled by the CPU mounted on the LGC board. (2) The image processing functions of the LGC board realizes the followings: • Smoothing processing • External input system interface • Image area control • Laser related control • Printer high quality processing 7 7.4.
7.5 Laser Driving PC Board (LDR board) Image signals processed on the LGC board are then processed by ASIC for writing control and Laser driving PC board. The signal is then laser controlled and written on the drum. (1) Setting of effective image area............................ • Top, bottom, left and right margins (2) Horizontal synchronization signal (H-Sync)......... • Reference clock signal in the printer section clock generation section (3) synchronized with H-Sync and its signal.
8. LASER OPTICAL UNIT 8.1 General Description The laser optical unit radiates the laser beam onto the photoconductive drum responding to the digital image signals transmitted from the scanner, printer controller, etc. to create the latent image. Image signal is converted into the light emission signal of the laser diode on the laser drive PC board, then radiated on the drum through the optical elements such as cylinder lens, polygonal mirror and fθ lenses.
Laser d ode Laser em ss on un t Polygonal motor F n te focus lens 8 Laser dr ve PC board Aperture Polygonal m rror f lens- Paper ex t Cyl nder lens Front Polygonal motor dr ve PC board H-Sync s gnal detect on PC board Rear f lens-2 Sl t glass (for outgo ng laser beam) H-Sync return ng m rror Fig.
8.2 Structure (1) Laser emission Unit This unit consists of the laser diode, finite focus lens, aperture and cylinder lens. a. Laser diode This laser diode features low droop, small laser variation and low threshold current. Aperture determines the shape of the laser beam at laser emission position of the primary scanning and secondary scanning. Laser diode radiates the laser beam responding to the laser emission control (ON/OFF) signal from the laser driving PC board.
(2) Polygonal motor unit This unit consists of the polygonal motor, polygonal mirror and polygonal mirror cover. a. Polygonal motor This motor rotates the polygonal mirror in (A) Drum high speed. The DC motor controls the rotation speed of the mirror motor as follows: During ready: 10,000.00 rpm During printing: 38,090.55 rpm (600dpi) : 38,951.37 rpm (FAX 15.4 × 16.0 dot/mm) : 37,490.70 rpm (FAX 16.0 × 15.4 dot/mm) 8 Laser beam b.
(3) fθ lenses-1 and -2 These two lenses perform the following adjustment on the laser beam reflected by the polygonal mirror. a. Uniform-velocity scanning W der Since the polygonal mirror is rotating at a uniform velocity, the laser beam reflected from the mirror scans over the drum Narrower surface at a uniform angular velocity; namely, the pitch between the dots on Drum the drum is wider at both ends than at the center of the scanning range.
(5) Laser Driving PC Board This control board has the following functions: a. APC control function (adjusts disparity of the laser intensity caused by temperature) b. Laser ON/OFF function (6) Slit glass Slit glass is located where the laser beam is output from the laser optical unit, and it protects the unit from dust.
8.3 Laser Diode The laser used in this equipment is a AlGaAs type semiconductive laser. It is generated in the singlehorizontal mode, and its wavelength is approx. 785 nm. This semiconductive laser outputs 5mW with standard DC power supply. Laser intensity is controlled by using the output from the PIN diode for monitoring light output in the semiconductive laser. of the semiconductive laser is as shown at right.
8.4 Laser Optical Unit Cooling Fan The laser optical unit cooling fan is a propeller fan (80 x 80 mm). It cools down the polygonal motor and the drive PC board. 8.5 Polygonal Motor (1) Drive circuit of the polygonal motor P93/T03 POMON IC8 P86/T0A Buffer 8 POMCK IC24 CPU P92/T12 POMPL LGC board POL board Fig. 8-501 (2) Control signal The polygonal motor is a DC motor which is PLL-controlled by clock signals. The signals from LGC board control the polygonal motor.
8.6 Disassembly and Replacement [A] Laser optical unit (1) Take off the receiving tray ( (2) Take off the front left cover ( (3) Chapter 2.5.1 [H]). Chapter 2.5.1 [B]). Disconnect the connector with lock (CN206) and connector (CN207) on the LRL PC board. (4) Disconnect the joint connector between the laser unit fan and polygonal motor. Fig. 8-601 (5) Remove 1 screw on the front side and loosen 1 screw on the rear side. Fig.
(7) Remove 3 screws with spring. Lift up the laser optical unit, avoiding contact with the laser unit fan. Note: 1. Do not leave fingerprints or stain on the slit glass. 2. Laser optical unit is a precise apparatus. Handle the unit with extra care not to shock or vibrate it. Fig. 8-604 3. Never attempt to disassemble the unit in the field since it is very sensitive to the dust and stain. 8 4.
9. PAPER FEEDING SYSTEM 9.1 Functions The purpose of this system is to pick up a sheet of paper from the drawer or bypass tray and transport it to the transfer position. The paper feeding system mainly consists of the pickup roller, feed roller, separation roller, transport roller, registration roller, bypass paper sensor, drawer empty sensor, drawer paper stock sensor, feed sensor, registration sensor and the drive system for these components.
Feeding system drive gear 2 (2 ) 25 (20/25) (27/ ) (40/34) (2 ) (2 ) (24/30) (23) Bypass unit 9 Upper drawer (3 /3 ) (35) (25/2 ) 2 (2 ) (34) (2 ) Lower drawer (33) (35) 27 (33) (35) 2 Fig. 9-102 Paper feeding section drive system (Rear side) No.
(1) Pickup roller This roller moves up and down to draw out a sheet of paper from the bypass tray or the drawer, and transport it to the feed roller. (2) Feed roller This roller transports the paper from the pickup roller to the registration roller. (3) Separation roller This roller is mounted against the feed roller.
(9) Drawer paper stock sensor This is a transmissive-type sensor which detects the amount of paper remaining in the drawer using an actuator. When the remaining paper has become around 100 sheets, the actuator blocks the light path of the sensor to notify that the paper quantity is getting less. (10) Feed sensor This sensor detects whether the leading/trailing edge of paper has passed the feed roller or not. It also detects jams such as paper misfeeding.
9.2 Operation 9.2.1 Operation of bypass pickup roller Gear on the equipment side Bypass feed clutch Coupling Bypass transport roller Bypass feed roller Bypass separation roller Bypass pickup roller Fig. 9-201 When the paper is set on the bypass tray, the bypass feed sensor detects the presence of the paper. Then the bypass pickup solenoid is turned ON and the pickup arm falls by its own weight.
9.2.3 Separation of paper The separation roller in this equipment works to Feed roller separate the sheets of paper being fed. The separation roller section consists of the feed roller, separation roller, spring joint, etc. The feed roller rotates in the direction of the white arrow (shown below in the figure at right) at the same timing as Spring joint the pickup roller rotation when the feed clutch is Separation roller turned ON. Fig.
9.2.4 General operation [A] From power-ON to ready status (1) When the equipment is turned ON, the tray-up motor starts to rotate forward and the upper drawer tray starts to rise. When the tray has risen and the tray-up sensor is turned ON (L→H), the tray-up motor is turned OFF, then the tray stops to rising. At this time, if the empty sensor is OFF (L), it is judged that there is no paper in the drawer. If the empty sensor is ON (H), there is paper in the drawer.
[D] Paper feeding (D-1) Lower drawer • The feed clutch and transport clutch (high speed) are turned ON, and the pickup roller, feed roller and transport roller rotate to start paper feeding. • The leading edge of paper turns the lower drawer feed sensor ON, and the feed clutch and transport clutch (high speed) are turned OFF and then back ON. • The leading edge of paper turns the registration sensor ON and the paper is aligned by the registration rollers.
9.3 Drive Circuit of Tray-up Motor The tray-up motor (T-UP-MTR) is driven by the LGC board IC1 (LGC: TA8428). The block diagram of TA8428 is shown below. Thermal shutdown over-current protect on c rcu t Control log c 9 2 3 4 5 7 IN IN2 M(+) GND M(-) N.C. VCC Fig. 9-301 IN1 and IN2 are input terminals to receive the signals from the tray-up motor. The control logic based on the signals from the tray-up motor, controls ON/OFF of the rotation direction.
9.4 Disassembly and Replacement [A] Bypass unit (A-1) Bypass unit (1) Remove the upper/lower drawer. (2) Remove 2 screws and take off the right front hinge cover. Right front hinge cover Screw Fig. 9-401 (3) Remove 2 screws and take off the right rear hinge cover. 9 Screw (4) Right rear hinge cover Fig. 9-402 Remove 2 screws and take off the right lower cover. Screw Right lower cover Fig. 9-403 (5) Remove 1 screw and take off the 2 ground wires.
(7) Open the side cover. Side cover Fig. 9-405 (8) Remove 2 screws, lift the bypass unit up, remove 2 hooks and pull it out to the front. Screw 9 Bypass unit Screw Fig. 9-406 (A-2) Hinge assembly (1) Take off the bypass unit ( Chapter 9.4 (A-1)). (2) Disconnect 1 connector and release the harness from harness clamp. Fig. 9-407 (3) Remove 2 screws and slide the hinge assembly to take it off with the tray. (Standing the tray makes easier to be removed.) Screw Fig.
(4) Pull out the hinge assembly from the bypass tray. Hinge assembly Fig. 9-409 (A-3) SFB board Screw (1) Take off the bypass unit ( Chapter 9.4 (A-1)). (2) Take off the hinge assembly ( Chapter 9.4 (A-2)). 9 (3) Remove 3 screws, 4 latches and 3 hooks, and take off bypass tray upper cover. Bypass tray upper cover Fig. 9-410 (4) Remove 1 screw and take off the plate spring. (5) Plate spring Bracket Remove 1 screw on the tray side and take off the bracket. Screw Fig.
(6) Disconnect 1 connector, remove 1 screw and take off the SFB board. Screw SFB board Fig. 9-413 (A-4) Bypass pickup solenoid Bypass feed upper cover Screw (1) Take off the bypass unit ( Chapter 9.4 (A-1)). (2) Remove 1 screw and slide the bypass feed upper cover to take it off. 9 Fig. 9-414 (3) Remove 4 screws and take off the upper plate. Screw Upper plate Fig.
(A-5) Bypass paper sensor (1) Take off the bypass unit ( (2) Take off the bypass feed upper cover ( Chapter 9.4 (A-1)). Chapter 9.4 (A-4)). (3) Take off the upper plate ( Chapter 9.4 (A-4)). (4) Take off the spring and sensor arm. Sensor arm Spring Fig. 9-417 (5) Disconnect the connector from the sensor and release the latch to take off the bypass paper sensor. 9 Bypass paper sensor Fig. 9-418 (A-6) Bypass pickup roller Screw (1) Take off the bypass unit ( Chapter 9.4 (A-1)).
(4) Remove the clip, pull out the shaft and take off the bypass pickup roller. Bypass pick up roller Timing belt Clip Shaft Fig. 9-421 (A-7) Bypass feed roller (1) Take off the bypass unit ( (2) Take off the bypass feed upper cover ( (3) Chapter 9.4 (A-1)). Bypass feed roller Clip Chapter 9.4 (A-6)). Take off the bypass drive unit ( 9 Chapter 9.4 (A-6)). (4) Remove the clip, pull out the shaft and take off the bypass feed roller. Note: Make sure the following items when assembling Fig.
(A-9) Bypass feed clutch (1) Take off the bypass unit ( (2) Take off the bypass tray and hinge assembly ( (3) Chapter 9.4 (A-1)). Chapter 9.4 (A-2)). Disconnect 1 connector and release the harness from harness clamp. (4) Remove the harness clamp. Fig. 9-424 (5) Remove 3 screws and take off the drive unit. Drive unit 9 Screw Fig. 9-425 (6) Remove the E-ring and the bush, and then pull out the shaft. (7) Remove 3 screws and take off the bracket.
(3) Take off the bypass separation roller assembly. Bypass separation roller assembly Fig. 9-428 (4) Detach the cover, the arbor, and the clutch spring from the shaft, and then take off the Shaft bypass separation roller. Arbor Cover Clutch spring Bypass separation roller Fig. 9-429 (A-11) Bypass feed sensor (1) Take off the bypass unit ( (2) Take off the lower plate ( Chapter 9.4 (A-1)). Chapter 9.4 Screw Sensor plate (A-10)). (3) Remove 1 screw and take off the sensor plate. Fig.
[B] Lower drawer feed sensor (1) Take off the bypass unit ( (2) Take off the ADU ( (3) Remove the upper and lower drawers. (4) Take off the front cover ( (5) Take off the front right cover ( (6) Chapter 9.4 (A-1)). Chapter 14.5 [A]). Chapter 2.5.1 [A]). Chapter 2.5.1 [B]). Take off the cleaner unit ( Jam access cover Chapter 11.6 [A]). (7) Open the jam access cover. (8) Release the latch and take off the transfer/ Fig. 9-432 separation charger.
(11) Take off the jam access cover. Jam access cover Fig. 9-436 (12) Disconnect the connector and remove the Harness harness. Connector Fig. 9-437 (13) Remove 2 screws and take off the right Bypass transport guide Spring transport guide. Note: When taking off the right transport guide, be careful not to come off the bypass transport Screw guide and the spring together with it. Right transport guide Screw Fig. 9-438 (14) Release the latch and take off the lower drawer feed sensor.
[C] Registration sensor, Upper drawer feed sensor (1) Take off the front cover ( Chapter 2.5.1 [A]). (2) Take off the front right cover ( Chapter 2.5.1 [B]). (3) Take off the right upper cover ( Chapter 2.5.1 [O]). (4) Take off the cleaner unit ( (5) Take off the IH terminal cover ( (6) Take off the right rear cover ( (7) Remove 1 screw and take off the front cover Chapter 11.6 [A]). Chapter 2.5.1 [F]). Screw Chapter 2.5.1 [G]). stay. (8) Front cover stay Fig.
(12) Remove 3 screws and take off the left transport guide. Left transport guide Screw Fig. 9-444 (13) Remove 2 screws and take off the registra- Roller supporting section tion front guide. Registration front guide Note: Be careful not to deform or damage the roller supporting section when installing or taking off the registration front guide. Screw Fig. 9-445 (14) Remove 1 screw and take off the registration sensor with bracket.
[D] Registration roller (1) Take off the bypass unit ( (2) Take off ADU ( (3) Take off the front cover ( (4) Take off the cleaner unit ( Chapter 9.4 (A-1)). Chapter 14.5 [A]). Chapter 2.5.1 [A]). Chapter 11.6 [A]). (5) Take off the rear cover ( Chapter 2.5.1 [H]). (6) Take off the right rear cover ( Chapter 2.5.1 [G]). (7) Take off the SYS board cover ( Chapter 2.5.2 [C]). (8) Take off the developer cooling fan-2 ( 9 (9) Chapter 11.6 [I]).
(13) Disconnect 3 connectors of the drive gear Connector unit. Connector Fig. 9-450 (14) Disconnect 2 connectors wired from the drive gear unit. Connector 9 Fig. 9-451 (15) Remove 5 screws and take off the drive gear unit. Screw Drive gear unit Fig. 9-452 (16) Remove the E-ring and the bushing of the Screw E-ring registration roller (1 pc. each). (17) Remove the E-ring and the bushing on the front side and slide the registration roller (rubber) to the rear side to take it off.
(18) Take off the registration roller (metal). Spring (front side: 1 E-ring, 1 bushing and 1 spring, Bushing rear side: 1 E-ring, 1 bushing and 1 spring) Spring E-ring Bushing E-ring Registration roller (metal) Fig. 9-454 [E] Tray drive unit/Tray-up motor (1) Remove the upper and lower drawers. (2) Take off the rear cover ( (3) Take off the right rear hinge cover 9 ( (4) Noise filter assembly Chapter 2.5.1 [H]). Chapter 2.5.1 [D]).
(9) Place the unit with its coupling up and release 6 latches to take off the cover. Coupling Coupling Note: Be careful in taking off the cover because there is a spring in the tray drive unit. Spring Fig. 9-458 (10) Take off the tray-up motor. Tray-up motor 9 Fig. 9-459 Note: Match the boss of the gear with the hole of the cover when installing the motor. Fig.
[F] Transport clutch (upper/lower) Take off the rear cover ( Chapter 2.5 1 [H]). (2) Take off the tray drive unit with its plate ( Chapter 9.4 [E]). (3) Remove 3 screws, 1 E-ring and take off the clutch bracket. Note: Do not apply pressure the transport clutch Clutch bracket (1) in all directions when installing the clutch Bush Bush E-ring Fig. 9-461 bracket. After installing it, open the side cover and check that the transport roller rotates smoothly.
2. Attach the clutches to the shafts as shown on the right. 0-0.5mm Fig. 9-464 [G] Drawer detection switch (upper/lower) (1) Remove the upper and lower drawers. (2) Take off the rear cover ( Drawer detection switch Chapter 2.5.1 [H]). (3) Take off the noise filter assembly (4 screws). (4) Take off the tray drive unit with its plate ( (5) 9 Chapter 9.4 [E]). Disconnect the connector, release the latch and take off the drawer detection switch from the front side. Fig.
(H-4) Paper stock sensor (1) Paper stock sensor Take off the drawer feeding unit ( Chapter 10.4 (H-1)). (2) Pull up the paper stock sensor arm. (3) Disconnect the connector and release the latch to take off the paper stock sensor. Paper stock sensor arm Fig. 9-468 (H-5) Separation roller (1) ( (2) 9 Screw Take off the drawer feeding unit Chapter 10.4 (H-1)). Remove 1 screw and take off the separation roller holder. Separation roller holder Fig.
(H-6) Feed roller (1) ( (2) Clip Chapter 10.4 (H-1)). Take off the separation roller ( (3) Feed roller Take off the drawer feeding unit Chapter 10.4 (H-5)). Remove the clip and take off the feed roller. Fig. 9-472 (H-7) Pickup roller (1) ( (2) Pickup roller Assembly Take off the drawer feeding unit Chapter 10.4 (H-1)). Remove the pickup roller assembly from the 9 pickup arms and take off the belt. Belt Fig.
(3) Remove 2 screws and take off the clutch bracket and bush. Notes: Bush Match the protruding portion of clutch with the position shown in the drawing for assembling. Clutch bracket Fig. 9-476 (4) Loosen 1 setscrew and take off the drawer feed clutch. 9 Drawer feed clutch Setscrew Fig. 9-477 Notes: Attach the clutch to the shaft referring to the figure at right. 0.2-0.5mm Fig.
10. DRIVE SYSTEM 10.1 General Description The drive system drives the drum, developer unit, cleaner unit, fuser unit, transport roller, feed roller (upper/lower drawer and bypass unit) and registration roller. The drive system is driven by the rotation of the main motor.
10.3 Main Motor 10.3.1 Main motor drive The main motor consists of the motor and the drive board combined with the motor, and its rotation is controlled by control signals (three) and reference frequency.
10.3.2 Control signals (1) MAMCW signal (LGC → MTR: Input) This is a signal to switch the direction of the main motor rotation. When this signal becomes “L” level, the main motor rotates counterclockwise as seen from the rear side, and drives the developer unit, drum, fuser unit, etc to the appropriate direction. (2) MAMPL signal (MTR → LGC: Output) When the difference of the FG pulse cycle against the reference frequency is within ±6.
10.4 Disassembly and Replacement [A] Main motor (1) Take off the rear cover ( Chapter 2.5.1 Connector [H]). (2) Take off the SYS board case ( Chapter 9.4 [D]). (3) Take off the developer unit cooling fans-1 & -2 ( (4) Chapter 11.6 [I]). Disconnect 1 connector. Fig. 10-401 (5) Remove 2 screws. (6) Release 1 locking support and take off the Locking support main motor with the board. Screw 10 Main motor Screw Fig.
(6) Disconnect 2 connectors. Connector Fig. 10-405 (7) Remove 5 screws and take off the gear unit. Screw Gear unit Fig. 10-406 [D] Developer drive clutch Screw Screw (1) Take off the gear unit ( Chapter 10.4 [C]). (2) Remove 2 screws and take off the bracket. (3) Remove the bushing and take off the devel- Bracket Bushing oper drive clutch. Note: Match the protruding portion of clutch with Developer drive clutch the position shown in the drawing for assembling.
10 e-STUDIO350/352/353/450/452/453 DRIVE SYSTEM 10 - © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved
11. DRUM RELATED SECTION 11.1 Configuration This chapter explains about the area around the drum, drum itself, image processing, their parts and control circuits.
11.2 Functions (1) Drum The drum is made of a cylindrical aluminum base coated with thin film of organic photoconductive substance. The photoconductive object becomes insulative (the electrical resistance is high) when it is not exposed to the light and electrically conductive (the electrical resistance is low) when it is exposed to the light. This object is called a photoconductor.
(4) Transfer / Separation charger (a) Transfer guide This guide leads the paper transported from the feeding unit to the transfer section. Positive (+) bias voltage is applied to the guide to prevent the transferability from being lowered under conditions such as high humidity. (b) Transfer charger The transfer charger applies a charge (positive (+) charge) which is contrary to the charging polarity of the toner to the back of the paper.
(7) Discharge LED Discharging is a process to decrease or eliminate the static electricity on the drum surface. The electrical resistance of the photosensitive layer is decreased by the light irradiation, and the residual charge on the drum surface is neutralized and eliminated (cleaned). The electrical potential of the drum surface is fixed to a certain amount before the drum is charged (The pre-exposure effect).
11.3 Output Control Circuits of High-Voltage Transformer 11.3.1 Overview • Generate the output control voltage Vc of the main charger, transfer/separation charger, transfer guide bias and developer bias. • Convert Vc The current is output linearly. 11.3.2 Description of operations HVT board NVRAM Adjustment value ASIC GA IC32 Digital data D/A converter Analog Main/ transfer/ separation/ chargers, developer bias and transfer guide bias Vc IC2 IC38 Output LGC board Fig.
D/A conveter ASIC GA CN30 -B 2 HVSAV Separat on charger CN30 -B HVTVR Transfer charger CN30 -B7 HVDVR Developer b as CN30 -B5 HVMVR Ma n charger IC2 NVRAM IC3 IC32 Fig.
11.4 Drum Temperature Detection Circuit (1) Purpose of the drum temperature detection circuit The amount of charge on the drum surface varies greatly with the surface temperature of the drum. This circuit detects the temperature of the drum surface, and the amount of charge on the drum surface is controlled to be constant based on the result. (2) Configuration of the drum temperature detection circuit +5V DRTH DRTMP- CPU Drum therm stor 11 GND GND Drum temperature detection circuit Fig.
11.5 Temperature/Humidity Sensor 11.5.1 General description This sensor measures the temperature and humidity inside the equipment. 11.5.2 Construction Temperature/humidity control circuit is configured as follows: PC7/AN7 HMS- A + - CPU TEMP- A PC3/AN3 R TH 11 LGC board HUMI-THS Fig.
11.6 Disassembly and Replacement [A] Cleaner unit (1) Open the front cover, take off the toner bag and front cover ( Chapter 2.5.1 [A]). (2) Take off the developer unit ( Chapter 12.5 [A]). (3) Open the bypass unit, ADU and jam access cover. (4) Release the latch and remove the toner bag full detection sensor-2. (5) Loosen 2 screws and take off the cleaner unit. Notes: Fig. 11-601 1. Hold the cleaner unit which has been taken off as shown in the figure. 2. Do not touch the drum surface. 11 Fig.
(B-3) Main charger wire * Length: 363 mm (tungsten wire) diameter: 0.06 mm (1) Take off each terminal cover of the front and rear sides. Fig. 11-605 (2) Remove the damper, terminal, spring and wire. Damper Wire Terminal Spring 11 Fig. 11-606 (B-4) Charger wire cleaning pad (1) Release the charger wire cleaner shaft from the hooks of the charger wire cleaning pads. Fig. 11-607 (2) Remove the charger wire cleaning pads.
[C] Drum (1) Pull out the cleaner unit and take off the main charger ( (2) Chapter 11.6 [A] (B-1)). Release the latch and remove the cleaner stay. Fig. 11-609 (3) Push the lever down to the left and release the lock. Then pull out the drum shaft. 11 Fig. 11-610 (4) Lift up the drum and take it off. Fig. 11-611 (5) Remove 6 screws and take off 2 flywheels. Fig.
Notes: 1. When installing, make sure that the pressure of cleaning blade is released with the jig. 2. Insert the head of the jig to the space shown in the figure while pushing the blade holder. 3. Be careful not to touch or scratch the edge of cleaning blade. Fig. 11-613 [D] Cleaner (D-1) Cleaning blade (1) Take off the cleaner unit. Then take off the main charger and drum ( Chapter 11.6 [A] (B-1) [C]). (2) Remove 2 screws and cleaning blade. 11 Fig.
(D-2) Recovery blade (1) Remove the cleaning blade ( Chapter 11.6 (D-1)). (2) Remove the recovery blade. Notes: 1. When attaching the recovery blade, clean the surface of the frame first. Be careful not to deform the blade. 2. Attach the recovery blade while pushing it to the step on the surface of the frame. Fig. 11-616 3. Press the stuck part with your finger to attach the blade securely. (D-3) Separation finger (1) Remove the drum ( Chapter 11.6 [C]). (2) Release the 3 separation fingers.
(E-2) Charger wire * Length: 363 mm (tungsten wire) diameter: 0.06 mm (For both transfer and separation) (1) Remove the separation supporter. (2) Take off each terminal cover on both front and rear sides. Fig. 11-619 (3) Remove the terminals, springs and wires. Terminal Notes: Spring Be careful of the followings when installing the wire. Wire 1. Insert the wire securely into the V-grooves of the front and rear sides. Spring 2. Do not twist the wire. 11 3.
[G] Discharge LED (1) Take off the developer unit and cleaner unit ( (2) Chapters 12.5 [A] and 11.6 [A]). Disconnect 1 connector and remove 1 screw. Then take off the discharge LED unit. Fig. 11-623 (3) Take off the discharge LED. 11 2 Fig. 11-624 [H] Toner bag full detection sensor (H-1) Toner bag full detection sensor-1 (1) Take off the rear cover ( Chapter 2.5.1 [C]). (2) Take off the registration clutch and gear unit ( (3) Chapter 10.4 [B] [C]).
(H-2) Toner bag full detection sensor-2 (1) Open the front cover. (2) Disconnect 1 connector and take off the toner bag full detection sensor-2. Fig. 11-627 [I] Developer unit cooling fan (I-1) Developer unit cooling fan-2 (1) Take off the rear cover ( Chapter 2.5.1 [C]). (2) Take off the SYS board with the whole case ( (3) 11 Chapter 2.5.2 [C]). Disconnect 1 connector and release the harness from 1 harness clamp. (4) Remove 2 screws and take off the duct. Fig.
(I-2) Developer unit cooling fan-1 (1) Take off the rear cover ( Chapter 2.5.1 [C]). (2) Take off the duct of developer unit cooling fan-2 ( (3) Chapter 11.6 (I-1)). Release 2 latches and take off the duct cover. Fig. 11-631 (4) Disconnect 1 connector and take off the developer unit cooling fan-1. Note: When installing, pay attention to the direction of the wind from the fan. 11 Fig. 11-632 (I-3) Developer unit cooling fan unit-1 (1) Take off the rear cover ( Chapter 2.5.1 [C]).
[J] Middle fan (1) Open the front cover. Take off the toner bag, toner cartridge, developer unit and cleaner unit ( (2) Take off the receiving tray and tray back cover ( (3) Chapters 12.5 [A] and 11.6 [A]). Chapter 2.5.1 [H] [I]). Take off the toner cartridge drive unit and discharge LED ( (4) Chapter 12.5 [I] [G]). Remove 1 screw and take off the toner bag Toner cartridge cover holder. (5) Remove 2 screw and take off the toner cartridge cover.
(11) Remove 1 screw and stand the developer unit guide aside. Fig. 11-637 (12) Remove 2 screws and take off the middle fan duct. 11 Fig. 11-638 (13) Disconnect 1 connector and remove 2 screws and take off the middle fan. Note: When installing, pay attention to the direction of the wind from the fan. Fig. 11-639 [K] Temperature / Humidity sensor (1) Open the front cover. (2) Take off the receiving tray ( Chapter 2.5.1 [H]). (3) Disconnect 1 connector and remove 1 screw.
(4) Remove 1 screw and take off the temperature / humidity sensor from the cover. Fig.
12. DEVELOPMENT SYSTEM 12.1 Configuration Development system consists of the following unit, components and control circuits.
12.2 Functions (1) Toner cartridge drive unit / Toner cartridge detection switch The toner cartridge is filled with toner. The toner motor drives the cartridge to supply the toner to the developer unit. The toner cartridge detection switch detects whether the toner cartridge is installed. (2) Developer unit (a) Developer material The developer material is made of a mixture of the carrier and toner. The carrier is an electrical conductive ferrite whose size is 30µm to 100µm.
12.3 Drive Circuit of Toner Motor The toner motor (brush motor) is a motor to supply toner from the toner cartridge to the developer unit. The toner motor is driven by the transistor TA8428 (LGC board: IC51). Circuit diagram of the toner motor MAIN -CPU ASIC GA TD 23 5 PC IC24 IC3 IC2 PC7 3 TA 42 2 IC5 Toner motor 5 F2 Fig. 12-301 Motor driver TA8428 (IC51) is connected with both ends of the motor wire.
12.4 Auto-Toner Circuit 12.4.1 General description (1) Function of the auto-toner circuit · Detects the toner density in the developer material, and supplies toner when the density is lowered to a certain level. · Detects that there is no toner left in the cartridge (toner-empty detection). (2) The auto-toner circuit consists of the following: · Auto-toner sensor : Detects the toner density.
12.4.2 Function of auto-toner sensor (1) Function a. Initialization adjustment function —At the first use of the equipment or when the developer material is replaced with a new one. Automatically adjusts the output value of the auto-toner sensor responding to humidity (input value to the main CPU) for the toner density of the new developer material so that it stays in range of 2.35 to 2.45V. b.
(2) Function of auto-toner sensor The auto-toner sensor consists of the following circuits: · Drive winding : A magnetic head (primary side) with a high-frequency magnetic field, which forms a magnetic circuit in the developer material. · Detection winding : Receives the change in the magnetic resistance of the developer material through the magnetic circuit (secondary side).
12.4.3 Adjustment using the temperature / humidity sensor Variation in the output (VATS) of the auto-toner sensor due to humidity is corrected using the temperature / humidity sensor to maintain the toner density in the developer material at a certain amount. 12.4.4 Adjustment using the drum thermistor Variation in the output (VATS) of the auto-toner sensor due to temperature is corrected using the drum thermistor to maintain the toner density in the developer material at a certain amount.
12.5 Disassembly and Replacement [A] Developer unit (1) Open the front cover and remove the toner bag. Fig. 12-501 (2) Disconnect 1 connector and loosen 1 screw. 12 Fig. 12-502 (3) Take out the developer unit. Note: Developer sleeve Do not touch the developer sleeve on the top of the developer unit. Fig. 12-503 [B] Developer material (B-1) Discharge of developer material (1) Slide the upper cover of developer unit to the direction of the arrow and take off the cover by releasing the latches.
(2) Incline the developer unit and discharge the developer material from the part denoted with the arrow. Fig. 12-505 (B-2) Filling developer unit with developer material (1) Install the developer nozzle jig on the developer bottle. (2) Rotate the gear on the rear side of the developer unit to the direction of the arrow while filling the developer unit with the developer material. Spread out the developer material over the developer sleeve. Fig.
(3) Remove 3 screws and take off the front cover of the developer unit. (4) Disconnect 2 connectors. Fig. 12-509 (5) Remove 1 screw and take off the polarity adjustment lever. (6) Guide roller Remove 1 E-ring and take off the guide roller. Note: When reassembling, match the polarity adjustment lever with the previously marked position on 12 the scale. Polarity adjustment lever Fig. 12-510 (C-2) Rear side (1) Remove 2 screws and take off the bracket. Fig.
[D] Auto-toner sensor (1) Discharge the developer material ( (2) Chapter 12.5 (B-1)). Disconnect 1 connector on the bottom of the developer unit. (3) Remove 1 screw and take off the auto-toner sensor. Fig. 12-513 [E] Drum thermistor (1) Discharge the developer material ( (2) Take off the front cover of developer unit ( (3) Chapter 12.5 (B-1)). Chapter 12.5 (C-1)). Remove 2 screws and take off the developer sleeve cover. Fig. 12-514 (4) Remove 1 screw and take off the drum thermistor. Fig.
[F] Developer sleeve (1) Discharge the developer material ( (2) Chapter 12.5 (B-1)). Take off the guide rollers (on both front and rear sides) ( (3) Take off the developer sleeve cover ( (4) Chapter 12.5 [C]). Chapter 12.5 [E]). Remove 2 screws. Lift up the shaft and take off the developer sleeve unit. Fig. 12-516 (5) Remove 4 screws and doctor blade. 12 Fig. 12-517 (6) Take off the developer sleeve. Developer sleeve Fig.
Notes: 1.When installing the developer sleeve unit, make sure that the side seals (urethane seal) of the front and rear sides do not come out of the case. 2.When installing the doctor blade, make the gap adjustment of the doctor sleeve. Fig. 12-520 [G] Mixer-1 (1) Discharge the developer material ( (2) Chapter 12.5 (B-1)). Take off the developer sleeve unit ( (3) Chapter 12.5 [F]). Take off the bushing on the front side. *Replacement of Oil Seal ( Page 12-15) Oil seal Bushing 12 Fig.
(5) Remove 1 bearing on the rear side and take Oil seal off the mixer-2. *Replacement of Oil Seal ( Page 12-15) Bearing Fig. 12-524 [I] Toner cartridge drive unit (I-1) Toner cartridge drive unit (1) Take off the toner cartridge. (2) Take off the developer unit ( (3) Take off the receiving tray ( (4) (5) Chapter 2.5.1[H]). Take off the tray back cover ( 12 Chapter 12.5 [A]). Chapter 2.5.1 [I]). Disconnect 1 connector and remove 1 harness clamp.
(I-2) Toner motor (1) Take off the toner cartridge drive unit ( (2) Chapter 12.5 (I-1)). Remove 2 screws and take off the toner motor. Fig. 12-527 (I-3) Toner cartridge detection switch (1) Take off the toner cartridge drive unit ( (2) Chapter 12.5 (I-1)). Remove 1 screw and take off the toner cartridge detection switch with the whole bracket. Fig. 12-528 (3) Remove 3 screws with a fine screwdriver and take off the toner cartridge detection switch and switch cover. Fig.
12 e-STUDIO350/352/353/450/452/453 DEVELOPMENT SYSTEM 12 - 16 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved
13. FUSER UNIT / PAPER EXIT SECTION 13.1 General Description Toner is fused by applying heat and pressure on the transferred image on the paper which is transported to the fuser unit. The paper is then transported to the receiving tray, paper exiting options or ADU. The fuser unit consists of the IH coil, fuser roller, pressure roller, separation fingers, cleaning roller, thermistors, thermostat, exit roller, exit sensor, etc.
13.3 Functions (1) IH coil (IH: Induction Heating) The IH coil is inside the fuser roller and applies the induction heating to the fuser roller. The coil is fixed at a position and does not move when the fuser roller is rotating. (2) Fuser roller The fuser roller is a metal roller which generates heat spontaneously with eddy current produced by the electromagnetic induction of IH coil. The fuser roller is heated by this self-heating of this roller, and then the toner is fused on the paper.
(8) Thermostat The thermostat cuts off the power supply to the IH coil by opening itself if the fuser roller becomes abnormally hot as a result of the problem such as thermistor malfunction. The thermostat for this equipment is used to prevent abnormal operation. When the thermostat detects any abnormality, it must be replaced as well as the other damaged parts in the fuser unit.
e-STUDIO350/352/353/450/452/453 FUSER UNIT / PAPER EXIT SECTION Upper l m t c rcu t Temperature control c rcu t 5V SW CPU Electr c power sett ng Error s gnal IH ON s gnal IH2 ON s gnal Power supply for Photocoupler AC l ne DC l ne AC nput N Control c rcu t nclud ng CPU L IH No se f lter Fuse Fuser roller IH power source/ dr ve c rcu t Co l output Thermostat Photocoupler Co l Ma n therm stor [Block d agram of fuser un t and IH control c rcu t] LGC 5V SW 13 Edge therm stor Breaker
13.4.2 Heating principle of IH Heater The magnetic field is generated by applying a high frequency current to the IH coil inside the fuser roller, which then generates the eddy current in it. When the eddy current flows, the Joule heat is generated by the resistance element of the fuser roller, which is then heated. In the IH coil method, the thermal efficiency is higher than the lamp method because the fuser roller is directly heated.
13.4.3 IH control circuit interface The IH control circuit uses a photocoupler as an insulation against the secondary circuit. The interface signals are as follows. CN No.
13.4.
13.4.5 Temperature detection section To maintain the stable temperature of the fuser belt, the thermistor detects the temperature and controls ON/OFF of the IH coil. Output from the thermistors is used to detect the abnormality. (1) (2) Relation between the thermistor output voltage and surface temperature of the fuser belt Output voltages of thermistors [V] Surface temperatures of fuser belt [oC] Approx. 0.5 40 Approx. 2.0 100 Approx. 3.5 160 Approx. 4.
(4) Temperature control at Energy Saving Mode This equipment has the following two types of temperature control for saving energy and returns to ready status to perform printing in each mode upon printing request. The period of time from the printing request to this mode can be set in “Setting Mode (08)” or by an administrator.
(5) Thermistor/Heater status counter control • To enhance the safety of the fusing section unit, CPU provides the following protection: When the third [C410] error has occurred after two consecutive [C410] errors, the IH coil is not turned ON and error [C410] is displayed immediately even if an operator turns OFF the power and back ON. However, if the equipment goes into a ready state normally with the thermistor/heater status counter “1” or below, the counter is cleared to “0”.
(6) Temperature detection configuration Thermistor is a device whose resistance decreases as it detects a higher temperature. Thus its input voltage to CPU changes and then CPU judges whether this change is normal or abnormal. If one of the fuser roller thermistors is broken, the control circuit judges that the fuser roller temperature is extremely low and keeps turning the IH coil ON.
(7) Abnormality detection by the thermistors The following table shows the conditions judging the fuser belt temperature abnormality and detecting timing.
13.4.6 Abnormality in the IH control circuit When an abnormality is detected in the IH control circuit, it stops the power supply to the IH coil and displays a message “call for service”. (1) IH control circuit CPU output level of the IH control circuit changes depending on the condition of IH coil. This output level goes through the photocoupler into the gate array. IH board LGC board VDD 5V SW Engine CPU PA2 PA3 H1ERR1 CPU H1ERR2 13 Fig.
(2) IH error Checking timing Port input value Error content Error H1ERR1 H1ERR2 code Counter Power ON Initial abnormality L L C470 10 In warming up IH power voltage abnormality L L C470 11 L H C480 12 IH circuit/coil abnormality H H C490 13 IH power voltage abnormality L L C470 14 L H C480 15 IH circuit/coil abnormality H H C490 16 IH power voltage abnormality L L C470 17 L H C480 18 IH circuit/coil abnormality H H C490 19 Normal H L - - IGBT hi
13.5 Control Circuit of Exit Motor The following is the control circuit of the exit motor. The exit motor is a stepping motor. The motor is turned ON/OFF and the direction of its rotation is switched by controlling the output timing of pulse signal (A0·A1·B0·B1). LGC board EXTMA-0 PG10 EXTMB-0 PG11 EXTMC-0 PG12 EXTMD-0 PG13 A A0 EXTMA B A1 EXTMC AB B0 EXTMB BB B1 EXTMD +5V Engine CPU Exit Motor PB1 VREF STK672 Fig. 13-501 13.
13.7 Disassembly and Replacement Harness clamp [A] Fuser unit (1) Take off the IH terminal cover ( Chapter 2.5.1 [L]). (2) Open the jam access cover and fuser unit cover. Disconnect 1 connector with lock, 2 faston terminals and 2 joint connectors. (3) Release the harness from 1 harness clamp. Fig. 13-701 (4) Close the fuser unit cover. (5) Remove 2 screws and take off the fuser unit. Notes: 1. Make sure to hold the plastic part of the faston terminals when disconnecting them. 2.
(4) Release 2 latches of the fan cover and take off the fan cover. (5) Release the harness from the guide of the cover. (6) Remove 4 screws and take off the fuser unit cooling fan. Fig. 13-705 [C] Exit sensor (1) Take off the fuser unit ( Chapter 13.7 [A]). (2) Release 2 latches of the exit sensor cover and take off the exit sensor cover. Fig. 13-706 (3) Release 3 latches of the exit sensor and 13 disconnect 1 connector while taking out the exit sensor. Fig.
[E] Separation finger for pressure roller (1) Take off the fuser unit ( Chapter 13.7 [A]). (2) Open the fuser unit cover and transport guide. (3) Take off the guide by removing 1 screw for each finger. (4) Remove 5 springs and take off 5 separation fingers for pressure roller. Fig. 13-709 [F] Separation finger for fuser roller (1) Take off the fuser unit ( Chapter 13.7 [A]). (2) Open the fuser unit cover and transport Stepped screw guide.
(5) Remove 2 screws on the rear side. Fig. 13-713 (6) Remove 2 screws on the front side. Fig. 13-714 (7) Take off the transport guide. 13 Fig. 13-715 (8) Take off the cleaning unit. Fig.
(9) Remove 1 C-ring and take off the cleaning roller with the whole bushings on both sides. (10) Take off the bushings from the cleaning roller. Fig. 13-717 [H] Pressure roller (1) Take off the cleaning unit ( Chapter 13.7 [G]). (2) Remove the pressure springs on both front and rear sides. (3) Pull out the pressure lever units on both left and right sides. Fig. 13-718 13 (4) Take out the pressure roller. Fig.
(5) Remove 1 screw and take off the coil holder on the rear side. Fig. 13-721 (6) Pull out the IH coil from the rear side. Fig. 13-722 [J] Fuser roller (1) Take off the fuser unit cover ( (2) Chapter 13.7 [B]). Take off the paper exit unit ( Chapter 13.7 [F]). (3) Take off the IH coil ( (4) Push down the pressure levers on both sides. Remove the E-ring and gear A on the rear side. After that, remove C-ring, gear and bushing in order. (5) (6) Gear A Chapter 13.7 [I]).
(7) Take out the fuser roller with the bushing from the front side. (8) Remove C-ring and bushing from the fuser roller. C-ring Bushing Fig. 13-725 Notes: When reassembling, pay attention to the fol- Outer side (C-ring side) lowings. 1. When inserting the fuser roller, be careful not to deform the thermistors. 2. Be careful of the installation direction of the gear (the direction of the protrusion Inner side (Bushing side) inside the gear). Protrusion 3. Make sure not to scratch the fuser roller.
[L] Thermostat (1) Take off the exit unit ( Chapter 13.7 [F]). (2) Release the harnesses of thermostat from 3 harness clamps. (3) Remove 2 screws and take off the thermostat with the whole holder. Fig. 13-728 (4) Remove 2 screws and take off the thermostat from the holder. Fig. 13-729 Notes: 13 When installing, pay attention to the followings. 1. Make sure to fix the thermostat, and then harness terminal in order on the holder. Screw A 2.
(5) Disconnect 2 connectors with lock and 4 connectors. (6) Remove 4 screws and take off the IH board. Cautions: Screw (A) 1. Tighten 2 screws (A) of the IH coil power supply harness completely (tightening torque: 1.17 - 1.56 N·m). 2. Since the IH control board is a highvoltage section, make sure to pull out the Connector with lock Fig. 13-732 power cable at maintenance. (M-2) IH board unit (1) Take off the IH terminal cover.
(3) Remove 1 connector and take off the IH board cooling fan. Note: When installing, pay attention to the direction of the wind from the fan. Fig. 13-735 [O] Exit motor (1) Take off the fuser unit ( (2) Take off the IH control PC board with the whole bracket ( (3) Chapter 13.7 [A]). Chapter 13.7 (M-2)). Remove 2 screws and disconnect 1 connector and take off the exit motor. Fig. 13-736 [P] Exit roller (1) Take off the fuser unit ( (2) Open the fuser unit cover and transport 13 Chapter 13.
(6) Take off the lower exit roller. Fig.
14. AUTOMATIC DUPLEXING UNIT (ADU) 14.1 General Description The Automatic Duplexing Unit (ADU) is a unit to automatically print on both sides of paper. A switchback method using the exit roller is adopted for the ADU of this equipment. A sheet of paper is switchbacked by the exit roller right after the printing operation (fusing operation) on one side is completed, and the reversed sheet is transported to the registration section for the other side of the sheet to be printed.
14.2 Description of Operations The back side printing (recording data of the back side of paper) is performed first by selecting duplex printing mode and pressing the [START] button. When the trailing edge of the paper passes the exit gate, the paper is switchbacked by the exit roller and transported into the ADU (the exit gate is closed with its own weight), and then the switchbacked paper is transported with acceleration. The transportation decelerates in front of the upper transport roller of the ADU.
(a) Single-paper circulation With the paper larger than A4/LT size, duplex printing (back-side printing → front-side printing) is performed for one sheet at a time as shown below. 2 2 2 ( ) (2) (3) 2 2 2 4 4 14 (4) (5) ( ) 4 2 2 2 4 3 3 4 (7) ( ) ( ) Fig.
(b) Double-paper alternateness circulation With A4/LT size paper or smaller, duplex printing is performed for two sheets at a time as shown below. Back side of the 1st sheet → Back side of the 2nd sheet → Front side of the 1st sheet → Front side of the 2nd sheet 2 2 ( ) (2) (3) 4 2 4 4 14 2 2 (4) (5) ( ) 4 2 2 3 3 4 (7) ( ) Fig.
(c) Multiple-paper circulation With more than one sheet of A4/LT size paper or smaller, duplex printing is performed as shown below in a following order: (In case of 5 sheets) Back side of the 1st sheet( 2 ) → Back side of the 2nd sheet( 4 ) → Front side of the 1st sheet( 1 ) → Back side of the 3rd sheet( 6 ) → Front side of the 2nd sheet( sheet( 8 ) → Front side of the 3rd sheet( 4th sheet ( 7 5 3 ) → Back side of the 4th ) →Back side of the 5th sheet( 10 ) → Front side of the ) → Front side of t
e-STUDIO350/352/353/450/452/453 AUTOMATIC DUPLEXING UNIT ADU motor ADU clutch ADU ex t sensor ADU entrance sensor ADU Reg strat on clutch Reg strat on sensor Ex t sensor 0 5 05 45 2 0 25 2730 2 5 3 0 3 5 3 45 3750 3 5 3 75 42 0 45 5 4 0 3 0 5 0 5 0 435 05 0 5 75 005 025 5 0 5530 5330 50 5 4 30 4740 14 Equ pment 70 5 77 5 7425 77 0 7425 77 0 7400 7340 7325 5 4 5 230 370 320 0 250 5 70 735 0070 0025 04 5
© 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 14 - ADU motor ADU clutch ADU ex t sensor ADU entrance sensor ADU Reg strat on clutch Reg strat on sensor Ex t sensor Equ pment 0 5 0 530 25 0 25 5 3 0 35 5 4505 4345 4 20 5 25 5 30 5 5 5 30 5 20 55 5 3 0 7230 7045 755 7 20 7735 775 235 Timing chart for duplex copying from upper drawer (A3, 1 sheet) 14 e-STUDIO350/352/353/450/452/453 AUTOMATIC DUPLEXING UNIT
14.3 Drive of ADU When the ADU motor rotates to the direction A, the upper transport roller is rotated driven by the gears and belt. The ADU clutch is then turned ON and the middle transport roller and lower transport roller are rotated. Upper transport roller ADU motor A Middle transport roller 14 ADU clutch Lower transport roller Fig.
14.4 Flow Chart Ex t motor reverse rotat on ON Spec f ed t me has passed ADU motor ON No ADU entrance sensor ON? Yes ADU transport jam (E5 0) Spec f ed t me has passed (Paper s transported to the f rst stopp ng pos t on n ADU) Tra l ng edge of f rst paper turned ON the ADU ex t sensor? No Yes 14 ADU motor ON ADU motor stopped ADU clutch ON ADU ex t sensor check the arr val No Yes ADU transport jam (E520) Spec f ed t me has passed A Fig.
A ADU paper feed ng command s gnal rece ved No Yes ADU motor stopped ADU clutch OFF ADU motor/clutch ON ADU feed ng operat on started Reg strat on sensor ON? No Yes 14 ADU m sfeed ng (E 0) Reg strat on n process Reg strat on process completed ADU motor stopped ADU clutch OFF Next paper s ready for the reg strat on Fig.
14.5 Disassembly and Replacement [A] ADU (1) Take off the upper and lower drawers. Fig. 14-501 (2) Remove 2 screws and take off the right front hinge cover. Right front hinge cover Screw Fig. 14-502 (3) Remove 2 screws and take off the right rear hinge cover. 14 Screw Right rear hinge cover Fig. 14-503 (4) Remove 2 screws and take off the right lower cover. Right lower cover Screw Fig.
(5) Disconnect 1 connector and remove 1 screw Connector and take off the ground wires. Screw Ground wire Fig. 14-505 (6) Remove the snap pin and slide ADU to the rear side to take it off. Snap pin Fig. 14-506 Note: Tape Since the jam access cover of the e-STUDIO352/353/452/453 does not lock, 14 be sure to fix it temporarily with adhesive tape or such before taking off the ADU. Fig.
[C] ADU opening / closing switch (1) Take off the ADU ( (2) Take off the ADU inside rear cover ( (3) Chapter 14.5 [A]). ADU opening/ closing switch Chapter 14.5 [B]). Disconnect the connector and release the latch to take off the ADU opening / closing switch. Fig. 14-509 [D] Paper guide (1) Take off the ADU ( Chapter 14.5 [A]). (2) Release the fulcrum on the front side and take off the paper guide. Paper guide Fig.
(3) Remove the screw and release the rear latch. Screw Rear latch Fig. 14-513 [G] Opening /Closing lever (1) Take off the ADU, ADU inside rear cover , ADU opening / closing switch, paper guide, and ADU cover ( Chapter 14.5 [A] to 14.5 [E]). (2) Remove 2 screws and take off the opening /closing lever. Opening / Closing lever Screw Fig.
[I] ADU driving PC board (ADU board) (1) Take off the ADU, ADU inside rear cover , ADU opening / closing switch, paper guide, and ADU cover ( Chapter 14.5 [A] to 14.5 [E]). (2) Disconnect 6 connectors and release 4 lock supports to take off ADU board. ADU board Fig. 14-517 [J] ADU motor (1) Take off the ADU, ADU inside rear cover , Binding band Connector ADU opening / closing switch, paper guide, and ADU cover ( Chapter 14.5 [A] to 14.5 [E]).
[L] ADU clutch (1) Take off the ADU, ADU inside rear cover , ADU opening / closing switch, paper guide, and ADU cover ( Chapter 14.5 [A] to 14.5 [E]). Take off the ADU motor ( Chapter 14.5 [J]). Take off the ADU gear unit ( Chapter 14.5 [K]). Remove 1 screw and disconnect the ground wire. Disconnect 1 connector. (2) (3) (4) (5) Ground wire Screw Connector Fig. 14-521 (6) Loosen 1 setscrew and take off the ADU Setscrew clutch. ADU clutch Fig.
(4) Remove the screw and release the rear latch. Screw Rear latch Fig. 14-525 (5) Remove 4 screws and take off the bracket. Screw Bracket Fig. 14-526 (6) Remove the clip, pulley, pin and belt on the rear side. Pin 14 Pulley Belt Clip Fig. 14-527 (7) Remove the clip on the front side. (8) Remove 2 bushings and take off the upper Upper transport roller Bushing transport roller. Clip Bushing Fig.
[N] Middle transport roller (1) Take off the ADU, ADU inside rear cover, ADU opening / closing switch, paper guide, and ADU cover ( Chapter 14.5 [A] to 14.5 [E]). (2) Take off the ADU board. ADU board Fig. 14-529 (3) Remove the clip, pulley, pin and belt on the front side. Pin Belt Clip Pulley Fig. 14-530 (4) Remove the clip on the rear side. 14 Clip Fig. 14-531 (5) Remove 2 bushings and take off the middle transport roller. Bushing Middle transport roller Bushing Fig.
[O] Lower transport roller (1) Take off the ADU, ADU inside rear cover, ADU opening / closing switch, paper guide, and ADU cover ( Chapter 14.5 [A] to 14.5 [E]). (2) Take off the ADU motor, the ADU gear unit and the ADU clutch ( Chapter 14.5 [J] to 14.5 [L]). (3) Clip Remove the clip on the rear side. Fig. 14-533 (4) Remove the clip, pulley, belt and pin on the front side. Pin Belt Clip Pulley Fig.
14 e-STUDIO350/352/353/450/452/453 AUTOMATIC DUPLEXING UNIT 14 - 20 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved
15. POWER SUPPLY UNIT 15.1 Construction The power supply unit consists of an AC filter and insulation type DC output circuits. (1) AC filter Eliminates noise from the outside and prevents the noise generated by the equipment from leaking to the outside. (2) DC output circuits Converts AC voltage input from outside to DC voltage and supplies it to each electric part. The DC voltage is divided into the following two lines. a.
15.3 Output Channel The followings are five output channels which are not linked with the door switch. (1) +3.3V +3.3VA +3.3VB +3.3VB +3.3VB (2) +5.1V +5.1VA +5.1VB +5.1VB +5.1VB +5.1VB +5.1VB +5.
The followings are two output channels which are linked with the door switch. (1) (2) +5.1V +5.
15.4 Fuse When the power supply secondary fuse is blown out, confirm that there is no abnormality with each part using the following table.
Neutral Live Breaker Noise filter © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 15 - 05/11 FUS board FIL board Main switch *ASD/AUD/CND models: Standard *MJD model: Option AC IN *NAD/SAD/TWD models: Standard AC MAIN AC DOOR Door switch CN411 CN411 F2 Switching power supply F1 IH Noise filter Noise filter Reg. Reg.
15.6 Sequence of Power Supply OFF ON 700ms or lower 0ms to 200ms AC input 3.2V or higher +3.3VA (Linked with main switch) 3.2V or higher +5.1VA (Linked with main switch) 0ms to 10ms or 200ms lower 4.95V or higher 20ms or 10ms or higher higher 4.95V or higher 10ms to 120ms 5ms or higher PWR-DN 20ms or 50ms or higher higher 0ms to 200ms 5ms or higher Max. 20ms +12VA, -12VA* (Linked with main switch) 11.4V or higher 11.
© 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 15 - 05/11 MJD MODEL: OPTION ASD,AUD,CND MODELS: STANDARD AC(N) 3 PWA-F-FUS CN431 AC(L) 4 MAIN GND J655 FG RY CN432 1 2 3 4 5 6 CN433 3 2 1 F 2 AC(L:MAIN) NF J656 4 3 AC(N) AC(L) SAD,TWD NAD MODELS: STANDARD NS-FIL (NOISE FILTER) 1 AC(N:MAIN) BREAKER G LOAD +5.
15 e-STUDIO350/352/353/450/452/453 POWER SUPPLY UNIT 15 - © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved
16.
e-STUDIO352/353/452/453 16 e-STUDIO350/352/353/450/452/453 PC BOARDS 16 - © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 07/11
(2) PWA-F-LGC e-STUDIO350/450 e-STUDIO352/353/452/453 16 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 16 - 07/11 e-STUDIO350/352/353/450/452/453 PC BOARDS
(3) PWA-F-SLG e-STUDIO350/450 e-STUDIO352/353/452/453 16 e-STUDIO350/352/353/450/452/453 PC BOARDS 16 - © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 07/11
(4) PWA-F-CCD (5) PWA-F-LRL (6) PWA-F-LDR 16 (7) PWA-F-SNS © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 16 - e-STUDIO350/352/353/450/452/453 PC BOARDS
(8) PWA-F-ADU (9) PWA-F-DSP e-STUDIO350/450 16 e-STUDIO352/353/452/453 e-STUDIO350/352/353/450/452/453 PC BOARDS 16 - © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 07/11
(10) PWA-F-KEY e-STUDIO350/450 e-STUDIO352/353/452/453 16 (11) PWA-F-FIL (* NAD/SAD/TWD models: Standard) © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 16 - 07/11 e-STUDIO350/352/353/450/452/453 PC BOARDS
(12) PWA-F-FUS (* ASD/AUD/CND models: Standard, MJD model: Option) 16 e-STUDIO350/352/353/450/452/453 PC BOARDS 16 - © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved